JP5771578B2 - Aqueous lubricant composition for high temperature plastic working and method for recovering lubricating performance of aqueous lubricant composition for high temperature plastic working - Google Patents

Description

The present invention relates to an aqueous lubricant composition for high-temperature plastic working and a method for recovering lubricating performance of an aqueous lubricant composition for high-temperature plastic working. The high temperature plastic processing in the aqueous lubricant composition for high temperature plastic processing defined in the present invention means high temperature plastic processing including hot forging, hot rolling, warm forging, warm rolling, etc., and cold forging. Or cold working such as cold rolling is excluded.
The aqueous lubricant in the aqueous lubricant composition for high-temperature plastic working defined in the present invention is a water-soluble lubricant that dissolves in water, a water-dispersed lubricant that disperses in water, or a colloid in water. An oil type lubricant that dissolves in a base oil and an oil dispersion type oil lubricant that disperses in a base oil are excluded.

  Methods for processing a metal material include cutting, turning, grinding, rolling, forging, sintering, die casting, and the like. In each processing method, a lubricant composition corresponding to the required characteristics is used. For example, in the forging field, a lubricant composition with high lubrication performance is used to prevent wear and damage due to direct contact between the workpiece and the mold, and to improve the machining performance to the specified dimensions. Has been.

  The lubricant composition includes so-called water-based lubricant compositions such as those obtained by dispersing a solid lubricant such as graphite in water and those obtained by dissolving a surfactant such as a low-molecular carboxylic acid in water. In addition, there are so-called oil-based lubricant compositions such as those obtained by dispersing a solid lubricant such as graphite in a base oil and those obtained by dissolving an extreme pressure agent in a flame-retardant base oil. Among these types of lubricant compositions, water-based lubricant compositions are widely used due to recent environmental awareness and safety issues. In the present invention, an aqueous type lubricant composition is simply referred to as an aqueous lubricant composition.

  In recent years, as a use form of a lubricant composition, for the purpose of reducing wasteful use of the lubricant composition, it is becoming more popular to circulate and use the lubricant composition instead of being disposable. Is a water-based lubricant composition (water-based lubricant composition), the problem is that the liquid stability is poor compared to oil-based lubricant compositions. In addition to the primary performance (lubricating performance) of the lubricant composition, secondary performance such as rot resistance, foam resistance, oil resistance and the like is also required.

  Used to improve adhesion between lubricant and metal during high-temperature plastic processing of metal materials when considering performance degradation due to cyclic use of aqueous lubricant composition during high-temperature plastic processing such as warm forging and hot forging. The main causes are the deterioration of the adhesion performance of the lubricant to the mold due to the thermal degradation of the so-called binder component (polymer compound) and the mixing of oil into the aqueous lubricant composition during processing. It is recognized.

  In particular, the deterioration of the processing performance due to oil mixture in the water-based lubricant composition for high-temperature plastic working is remarkable, and even if measures are taken to remove the mixed oil with equipment such as an oil skimmer, It is difficult to completely remove the oil contained in the aqueous lubricant composition. Even if a small amount of oil is mixed into the water-based lubricant composition, the processing performance of the water-based lubricant composition is lowered, defective products are generated, and the mold or the like is easily damaged. For this reason, it is assumed that the water-based lubricant composition used in circulation is supplemented with a large amount of the water-based lubricant composition and used in a high concentration. In such a case, the use of a large amount of a water-based lubricant composition increases the cost, and there is a problem in that a lacking state occurs due to an increase in residue on a mold or the like.

  Therefore, it is necessary to take measures such as discarding the high-temperature plastic working aqueous lubricant composition mixed with oil and replacing it with a new high-temperature plastic working water-based lubricant composition not containing oil. Thus, problems such as high cost and waste liquid generated in large quantities due to the use of the water-based lubricant composition are newly generated.

  In the field of high-temperature plastic working such as warm forging and hot forging, the water-based lubricant composition for high-temperature plastic working generally used is a graphite-type water-based lubricant composition containing graphite and no graphite. It is roughly classified into non-graphite type water-based lubricant compositions. In these water-based lubricant compositions, it is difficult to completely prevent thermal deterioration of the binder due to circulation and mixing of machine oil used in a press machine or the like. For this reason, although there is a high need to change the lubricant composition for high-temperature plastic processing from a graphite-type aqueous lubricant composition to a non-graphite-type aqueous lubricant composition at the production site, these The current situation is that no changes have been made to the water-based lubricant composition.

  In particular, in a non-graphite type aqueous lubricant composition, even if a small amount of oil is mixed, the processing performance is significantly reduced. For this reason, in the non-graphite type aqueous lubricant composition, even when the initial lubrication performance is satisfied and an effect in improving the work environment is exhibited, the frequency of renewal of the aqueous lubricant composition However, there are many cases where it is expensive and has problems in terms of cost and cannot be used continuously. In the water-based lubricant composition, since it is necessary to use it at a high concentration, there is an environmental load due to the conversion from the graphite-type water-based lubricant composition to the non-graphite-type water-based lubricant composition. It can be considered large.

  In order to prevent the above-described deterioration of the processing performance due to the cyclic use of the aqueous lubricant composition for high-temperature plastic working, a “water-soluble oil composition” containing a specific polymer cation compound has been proposed (see Patent Document 1). ). The water-soluble oil composition can be used stably for a long period of time, preventing spoilage due to the addition of other oils to the water-soluble oil agent used (diluent oil), deterioration of processing performance, deterioration of work environment due to stickiness, etc. Is intended to be.

  In addition, a water-based lubricant composition for high-temperature plastic working has been proposed as a “water-based lubricant for plastic working” in which a cationic surfactant is contained in a solid lubricant dispersed in water (see Patent Document 2). reference). The water-based lubricant is an excellent lubricant film on the surface of work materials and tools for plastic working by preventing the wettability from being reduced by mixing other oils with the water-soluble oil (diluent) used. Is intended to form.

  In addition, in the aqueous lubricant composition for high-temperature plastic working, “aluminum hot forging lubrication mold release agent” in which a wettability improving agent is contained in a solid lubricant has been proposed (see Patent Document 3). . The lubricant release agent is intended to prevent a reduction in the adhesion efficiency of the lubricating component to the mold due to water as a dispersion medium of the aqueous lubricant at a high temperature. In the lubricant release agent, one or more of sodium dioctyl sulfosuccinate, sodium di-2-ethylhexyl sulfosuccinate, sodium perfluoroalkylcarboxylate, and sodium perfluoroalkylsulfonate are used as the wetting improver. Yes.

  In the aqueous lubricant composition for high-temperature plastic working, since the dispersion medium of the solid lubricant is water, when the aqueous lubricant composition is sprayed on the mold at a high temperature exceeding 100 ° C., such as during hot forging. The water droplets of the dispersion medium form a boiling film, and the water droplets containing the lubricating component are blown off from the mold, and the adhesion efficiency of the lubricating component to the mold is greatly impaired. The above-mentioned “lubricating mold release agent for hot forging in aluminum” improves the wettability at high temperature by selecting the specific compound described above as a wettability improver, and water droplets can be applied thinly to the mold. It spreads and adheres to prevent water droplets from being blown off.

Japanese Patent Laid-Open No. 10-324887 JP 2008-231160 A JP 2010-65135 A

By the way, in the “water-soluble oil composition (refer to Patent Document 1)” and “water-based lubricant for plastic processing (refer to Patent Document 2)”, a cationic compound is used to suppress deterioration of processing performance. Is adopted. The cationic compound is incompatible with anionic compounds generally used as lubricants, dispersants, solubilizers, leveling agents, etc., which are components of aqueous lubricant compositions, and maintains a liquid state. Even if the lubrication performance can be satisfied temporarily, the effect cannot be continuously maintained against oil contamination. Further, the cationic compound has insufficient oil / water separation performance, and it is difficult to maintain the lubrication performance when the oil is mixed.

  On the other hand, the above-mentioned specific sulfosuccinate or sulfocarboxylate is used as a wettability improver in “aluminum hot forging lubricating mold release agent” (see Patent Document 3). According to the lubricating mold release agent, it is claimed that the wettability at high temperature is improved and the water droplets are thinly spread and adhere to the mold. In other words, it is presumed that the lubricating mold release agent does not have an improvement effect on oil contamination.

  In any case, in the conventional water-based lubricant composition for high-temperature plastic working, it is difficult to recover the lubrication performance when the oil component is mixed, and the oil component is mixed into the water-based lubricant composition. It is necessary to add a new water-based lubricant composition that has not been used, or to discard the used water-based lubricant composition (waste liquid) and replace it with a new water-based lubricant composition. In such a measure, there is a problem that the amount of the aqueous lubricant composition used is increased more than necessary, and a large amount of waste liquid is generated.

  The present invention has been made to cope with such a problem. The object of the present invention is to improve the oil-water separation performance in the high-temperature plastic working water-based lubricant composition, and to mix the oily high-temperature plastic working water. Prevents the deterioration of the processing performance due to the deterioration of the adhesion performance of the lubrication component to the work material or processing tool due to oil mixing when reusing the system lubricant composition, such as recycling, and high-temperature plastic processing Even after the oil component is mixed into the water-based lubricant composition, the specific component (lubricant performance recovery agent) employed in the water-based lubricant composition is used as the water-based lubricant composition for high-temperature plastic processing after the oil component is mixed. The purpose of this is to restore the lubricating performance of the aqueous lubricant composition with reduced processing performance.

  The present invention relates to an aqueous lubricant composition for high-temperature plastic working and a method for recovering lubricating performance of an aqueous lubricant composition for high-temperature plastic working.

  The water-based lubricant composition for high-temperature plastic working according to the present invention is mainly composed of at least one lubricant having an organic compound or an inorganic compound as a lubricating component, and water functioning as a solvent or dispersion medium for the lubricant. A water-based lubricant composition for high-temperature plastic working as a component.

  Thus, the aqueous lubricant composition for high-temperature plastic working according to the present invention contains a lubricating performance recovering agent that recovers a decrease in lubricating performance caused by oil mixed in the aqueous lubricant composition. As a performance recovery agent, ammonium diisodecyl sulfosuccinate is employed.

  In the aqueous lubricant composition for high-temperature plastic processing according to the present invention, the content of ammonium diisodecyl sulfosuccinate, which is the lubricating performance restoring agent, with respect to the entire aqueous lubricant composition is 0.0001 to 5.0% by weight. A range is preferable.

  Further, the method for recovering the lubricating performance of the aqueous lubricant composition for high-temperature plastic working according to the present invention comprises at least one lubricant of a lubricant containing an organic compound or an inorganic compound as a lubricant component, and a solvent or dispersion medium of the lubricant. This is a method for recovering the lubricating performance of a water-based lubricant composition for high-temperature plastic working that contains water as a main constituent.

  Thus, in the method for recovering the lubricating performance of the aqueous lubricant composition for high-temperature plastic working according to the present invention, the lubricating performance recovery is performed on the aqueous lubricant composition for high-temperature plastic working whose lubricating performance has deteriorated due to the mixed oil. A water-based lubricant composition for high-temperature plastic working containing ammonium diisodecyl sulfosuccinate or ammonium diisodecyl sulfosuccinate, which is an agent, is added.

  In the method for recovering the lubricating performance of the aqueous lubricant composition for high-temperature plastic working according to the present invention, the aqueous lubricant composition for high-temperature plastic working, which is the object of recovering the lubricating performance, is replaced with the ammonium diisodecyl sulfosuccinate that is the lubricating performance recovering agent. It can be set as the water-system lubricant composition for high temperature plastic processing which does not contain.

  Further, in the method for recovering the lubricating performance of the aqueous lubricant composition for high-temperature plastic working according to the present invention, the aqueous lubricant composition for high-temperature plastic working, which is the object of recovering the lubricating performance, is added to the diisodecyl sulfosuccinate which is the lubricating performance recovering agent. Although it contains ammonium acid, it can be set as the water-system lubricant composition for high temperature plastic processing in which the lubrication performance has fallen due to the large amount of mixed oil.

  The lubricant for recovering lubricating performance constituting the aqueous lubricant composition for high-temperature plastic working according to the present invention is ammonium diisodecyl sulfosuccinate. Ammonium diisodecyl sulfosuccinate is an anionic compound in structure and has good compatibility with other components of the aqueous lubricant composition and can be widely applied as one component of the aqueous lubricant composition. There are advantages.

  The water-based lubricant composition for high-temperature plastic working according to the present invention contains ammonium diisodecyl sulfosuccinate as a lubricant recovery agent, and therefore has high oil-water separation performance of oil mixed in the water-based lubricant composition, and In addition, the occurrence of repelling due to oil contamination on the surface of the high-temperature mold, processing tool, etc. and / or workpiece during high-temperature processing is suppressed, and the lubricating component adheres well to these surfaces.

  In addition, if the diisodecyl sulfosuccinate ammonium employed in the present invention is added to a water-based lubricant composition for high-temperature plastic working where the mixed oil cannot be separated into oil and water, the oil / water separation performance can be improved and the lubricating component can be improved. It can be satisfactorily adhered to the surface of a workpiece such as a high-temperature mold, a processing tool, and / or a workpiece. In other words, the lubricating performance of the aqueous lubricant composition can be recovered by adding ammonium diisodecylsulfosuccinate to the aqueous lubricant composition for high-temperature plastic working in a state where the mixed oil cannot be separated into oil and water.

  Therefore, if the method for recovering the lubricating performance of the aqueous lubricant composition for high-temperature plastic working according to the present invention is adopted, the aqueous system in the case of reusing the aqueous lubricant composition for high-temperature plastic working mixed with oil is reused. The lubricating performance of the lubricant composition can be preferably recovered.

  Such an effect by ammonium diisodecyl sulfosuccinate is recognized as the balance between the affinity of ammonium diisodecyl sulfosuccinate for oily components and the affinity for aqueous components to appropriately improve oil-water separation performance, and Even after the oil component is mixed into the water-based lubricant composition, it is possible to maintain good adhesion performance of the lubricating component to the surface of the high-temperature mold, processing tool, and / or the workpiece.

  As described above, the ammonium diisodecylsulfosuccinate defined in the present invention not only functions as a component of the aqueous lubricant composition for high-temperature plastic working, but also, for example, has already been used at the processing site and contains oil. By supplementarily adding to various water-based lubricant compositions for high-temperature plastic working whose processing performance (lubricating performance) is reduced, the reduced lubricating performance can be recovered (improved). In this case, it is possible to adopt a mode in which ammonium diisodecylsulfosuccinate is added alone to the aqueous lubricant composition for high-temperature plastic working whose lubrication performance has been lowered, and diisodecyl containing other components and solvents. An embodiment in which ammonium succinate is added can also be adopted.

  The present invention relates to a water-based lubricant composition for high-temperature plastic working and a lubricating performance recovery method for recovering the lubricating performance of a water-based lubricant composition for high-temperature plastic working.

  The high temperature plastic working in the aqueous lubricant composition for high temperature plastic working according to the present invention includes high temperature plastic working such as hot forging, hot rolling, warm forging and warm rolling, and also includes a high temperature plastic working aqueous system. The water-based lubricant in the lubricant composition includes a water-soluble lubricant that dissolves in water, a water-dispersed lubricant that disperses in water, and a colloid-type and emulsion-type lubricant that disperses in water as a colloid.

  As a water-soluble type lubricant to which the present invention is applied, a lubricant in which an organic compound containing an alkali metal salt of a low molecular carboxylic acid and / or a component neutralized with an alkali is completely dissolved in water. And a lubricant in which an inorganic compound containing potassium tetraborate, sodium tetraborate, sodium sulfate, potassium sulfate or the like is completely dissolved in water.

  Further, the water dispersion type lubricant to which the present invention is applied is an organic or inorganic lubricant (solid lubricant) that is hardly soluble in water, dispersed in water, such as graphite, molybdenum disulfide, water A lubricant in which calcium oxide, melamine-isocyanuric acid adduct (MCA) and the like are dispersed in water can be given.

  Moreover, as a colloid type lubricant to which the present invention is applied, a lubricant in which an alkali metal of a high molecular carboxylic acid is dispersed in water in a colloidal form can be exemplified. In addition, the emulsion type lubricant does not contain water containing oily components, surfactants, solid lubricants, etc., as a lubricant in which metal soap, base oil, oily silicon, etc. are emulsified and dispersed in water. A lubricant obtained by diluting an oil-based composition with water to be emulsified can be mentioned.

  The water-based lubricant composition for high-temperature plastic working according to the present invention comprises these lubricants as main lubricating components, and the lubricating components contain ammonium diisodecyl sulfosuccinate as a lubricating performance restoring agent. The water-based lubricant composition for high-temperature plastic processing according to the present invention includes an embodiment in which each of the above-described constituents not containing water is diluted with water as a solvent and / or a dispersion medium at the processing site. To do.

  Ammonium diisodecyl sulfosuccinate, which is a component of the high-temperature plastic working aqueous lubricant composition according to the present invention, functions to improve the oil-water separation performance of the high-temperature plastic working aqueous lubricant composition. When the water-based lubricant composition for high-temperature plastic working is reused, such as circulating, it prevents the deterioration of the processing performance due to the deterioration of the adhesion performance of the lubricating component to the work material, the processing tool, and the like.

  Ammonium diisodecylsulfosuccinate, which is a lubricating performance recovery agent, functions to recover the lubricating performance of the aqueous lubricant composition for high-temperature plastic working, in which the lubricating performance is reduced due to oil contamination. By adding ammonium to the aqueous lubricant composition for high-temperature plastic working where the lubricating performance is reduced, the lubricating performance of the aqueous lubricant composition for high-temperature plastic working can be effectively recovered.

  In the aqueous lubricant composition for high-temperature plastic working according to the present invention, the content of ammonium diisodecyl sulfosuccinate, which is a lubricant for restoring lubricating performance, is 0.0001 to 5.0 wt% with respect to the entire aqueous lubricant composition. % Is preferable.

  The water-based lubricant composition for high-temperature plastic working according to the present invention must contain at least one of the above-mentioned lubricants and ammonium diisodecyl sulfosuccinate, but the water-based lubricant composition requires as necessary. , Antirust agent, binder, antifoaming agent, foaming agent, emulsifier, dispersant, solubilizer, anti-blocking agent, rheology control agent, leveling agent, mist inhibitor, antiseptic, antioxidant, organic amine additive Various components conventionally used as constituent components of the lubricant composition can be contained.

  The field in which the aqueous lubricant composition for high-temperature plastic working according to the present invention is used is the field of warm plastic working in which processing is performed by heating a metal that is a workpiece to a recrystallization temperature or lower, and the workpiece This is the field of hot plastic processing where the metal is heated to a recrystallization temperature or higher, and in this processing field, an aqueous lubricant composition for high temperature plastic processing is sprayed on molds and other processing tools. The method of apply | coating, the method of apply | coating by brush coating, etc. are taken. The work material to which the aqueous lubricant composition for high-temperature plastic working according to the present invention is applied is not particularly limited as long as it is a metal, but is effectively applied to steel, stainless steel, aluminum, magnesium, copper, and the like. . When the water-based lubricant composition is applied to steel, for example, the temperature of a mold or a processing tool can be set in a range of 50 to 500 ° C, and the temperature of a workpiece can be set in a range of 100 to 1300 ° C. .

  The solvent or dispersion medium constituting the high-temperature plastic working aqueous lubricant composition according to the present invention is water, and tap water, ground water, industrial water, pure water, distilled water, ion-exchanged water, and the like can be employed. However, an alcohol solvent that is miscible with water can be used in combination with water.

  In the usage mode of the aqueous lubricant composition for high temperature plastic working, the aqueous lubricant composition for high temperature plastic working is applied (spray coating) by spraying it onto the mold, processing tool or workpiece during the high temperature plastic working. There is a so-called circulation method in which the applied aqueous lubricant composition is collected in a pit, and the recovered aqueous lubricant composition is reused. There is a method in which an aqueous lubricant composition is once recovered in a container and the recovered aqueous lubricant composition is reused for brush coating.

  In these usage modes of the aqueous lubricant composition for high-temperature plastic working, it is inevitable that the oil component resulting from the plastic working into the aqueous lubricant composition for high-temperature plastic working is unavoidable. The processing performance (lubricating performance) of the agent composition is reduced.

  Ammonium diisodecyl sulfosuccinate, which is a lubricating performance recovery agent constituting the aqueous lubricant composition for high-temperature plastic working according to the present invention, functions to prevent a decrease in lubricating performance due to oil contamination in the aqueous lubricant composition. .

  Further, in the aspect of reusing the water-based lubricant composition for high-temperature plastic working according to the present invention such as circulation use, repeated use makes it impossible to prevent a reduction in lubrication performance due to the mixing of a large amount of oil. Sometimes. In this case, if the water-based lubricant composition to be circulated is added with ammonium diisodecyl sulfosuccinate, which is a lubricating performance restoring agent, and the water-based lubricant composition is not mixed with oil. If is newly added, the lubricating performance of the aqueous lubricant composition can be recovered.

  On the other hand, a general high-temperature plastic working water-based lubricant composition does not contain ammonium diisodecyl sulfosuccinate, which is a lubricant for restoring lubricating performance, so it is difficult to maintain lubricating performance when oil is mixed. However, if ammonium diisodecyl sulfosuccinate is added alone to the aqueous lubricant composition mixed with oil, or if an aqueous lubricant composition for high-temperature plastic working containing ammonium diisodecyl sulfosuccinate is added, The lubricating performance of the aqueous lubricant composition can be recovered.

  Thus, the aqueous lubricant composition for high-temperature plastic working according to the present invention is composed of ammonium diisodecyl sulfosuccinate, which is a lubricant for restoring the lubricating performance, and the aqueous lubricant for high-temperature plastic working according to the present invention. The method for recovering the lubricating performance of the agent composition employs ammonium diisodecyl sulfosuccinate as the lubricating performance recovering agent.

  Ammonium diisodecyl sulfosuccinate, which is a lubricant for restoring lubricating performance, is an anionic compound in structure and has good compatibility with other components of the aqueous lubricant composition, and as a component of the aqueous lubricant composition. It can be widely applied, the oil mixed in the water-based lubricant composition is efficiently separated into oil and water, and the oil is mixed on the surface of the high-temperature mold / working tool and / or workpiece during high-temperature plastic working. Thus, the lubrication component can be efficiently attached to these surfaces.

  Also, ammonium diisodecyl sulfosuccinate employed in the present invention is an aqueous lubricant composition for high-temperature plastic working in a state in which oil and water cannot be separated due to oil mixing (water-based lubricant composition for high-temperature plastic working according to the present invention and general Oil-water separation performance can be restored by adding oil to the surface of high-temperature molds / processing tools and / or workpieces. Thus, the lubricating component can be efficiently attached to these surfaces.

  This action effect by ammonium diisodecyl sulfosuccinate is the proper balance between the affinity of ammonium diisodecyl sulfosuccinate for oily components and the affinity for aqueous components to restore oil-water separation performance. Even after the oil component is mixed into the agent composition, it is possible to maintain good adhesion performance of the lubricating component to the high-temperature mold / working tool and / or the surface of the workpiece.

Examples and Comparative Examples

  In Examples and Comparative Examples of the present invention, an aqueous lubricant composition for high-temperature plastic working containing ammonium diisodecyl sulfosuccinate, which is a lubricant for restoring lubricating performance, and an aqueous lubricant for high-temperature plastic working not containing ammonium diisodecyl sulfosuccinate are included. Kinds were prepared. These water-based lubricant compositions were subjected to a lubrication performance test, an adhesion performance test, and an oil / water separation performance test.

  (Aqueous lubricant composition for high-temperature plastic working): Preparation of the aqueous lubricant composition for high-temperature plastic working according to the examples of the present invention includes (A): ammonium diisodecyl sulfosuccinate as a composition component, (B): In addition to graphite (lubricating component), as lubricating components, (C): molybdenum disulfide, (D): boron nitride, (E): sodium sulfate, (F): potassium sulfate, (G): potassium hydroxide, ( H): potassium tetraborate, (I): sodium tetraborate, (J), melamine-isocyanuric acid adduct, (K): sodium hexahydrophthalate, (L): disodium phthalate, (M) : Sodium trimellitic acid, (N): Sodium pyromellitic acid, (O): Isobutylene-maleic anhydride copolymer sodium (MW 80-90,000), (P): Isobutylene-maleic anhydride co Combined ammonium (MW 100,000), (Q): homopolymer sodium acrylate (MW 100,000), (R): homopolymer ammonium acrylate (MW 100,000), (S): sodium styrene-maleic anhydride copolymer (MW1) .10,000), (T): styrene-maleic anhydride copolymer ammonium (MW 11,000) is appropriately employed.

  On the other hand, the preparation of the aqueous lubricant composition for high-temperature plastic working according to the comparative example does not employ ammonium diisodecyl sulfosuccinate (A) as a composition component, and corresponds to the lubricating performance recovering agent in addition to the above-described composition components. (U): sodium 2-ethylhexylsulfosuccinate, and (V): ammonium 2-ethylhexylsulfosuccinate, which are the improvers to be used.

  About the composition of the prepared aqueous lubricant composition for high-temperature plastic working, the aqueous lubricant composition for high-temperature plastic working according to the examples of the present invention is shown in the following tables (Tables 1A to 5A), and in the comparative examples. The aqueous lubricant composition for high temperature plastic working is shown in the following tables (Tables 6A to 11A).

  (Lubrication performance test, no oil added): For the lubrication performance test, a so-called spike test method (see Japanese Patent Laid-Open No. 5-7969) is adopted, and each water-based lubricant composition for high-temperature plastic working is used as a test sample. The lubrication performance of each test sample was evaluated. The lubrication performance test was performed using a crank press under the test conditions shown in Table 12.

  Each test sample was prepared by diluting each water-based lubricant composition for high-temperature plastic working shown in Tables 1A to 11A 10 times with pure water, and subjected to a lubrication performance test. For each test sample, the lubrication performance test was repeated three times. As the evaluation method of the lubricating performance, the maximum molding load (tonf) and spike height (mm) at the time of indentation were adopted, and the evaluation was made by the average value of the results of the lubricating performance test conducted three times.

  (Lubrication performance test, addition of oil): In the lubrication performance test, a lubricant composition for high-temperature plastic working in which 0.02 wt% of machine oil was added to the same test sample as employed in the lubrication performance test without addition of oil was used. Adopted as a test sample, a lubrication performance test was performed under the same test conditions as the lubrication performance test with no oil added, and the lubrication performance was evaluated by the same method. However, the evaluation of the lubrication performance in the lubrication performance test includes the maximum molding load change rate (%) ... the maximum molding load change rate = [(maximum molding load after addition of oil-maximum molding load without addition of oil) / oil content. Non-added maximum forming load] × 100.

  In the evaluation of the maximum molding load change rate, the increase (+) in the maximum molding load is less than 2.0%, and the increase in the range of 2.0% to less than 3.5% is Δ, 3.5% What increased more than was made x. However, in this example and the comparative example, an increase (Δ) in the range of 2.0% or more and less than 3.5% was not recognized.

  (Adhesion performance test, no oil added): A test piece (0.8 × 50 × 75 mm) of SUS304 preliminarily alkali degreased was placed on a hot plate and heated until the surface temperature reached 200 ° C. The same test sample as the non-oil-added test sample used in the lubrication performance test was sprayed on the piece under the application conditions (spray conditions) shown in Table 12. Was confirmed visually. The case where no occurrence of flipping or the occurrence of coating spots was evaluated as “◯”, and the case where occurrence of flipping or the occurrence of coating spots was evaluated as “X”. In the adhesion performance test, the test was repeated three times.

  (Adhesion performance test, addition of oil): In the adhesion performance test, a lubricant composition for high-temperature plastic working in which 0.02 wt% of machine oil was added to the same test sample as employed in the lubrication performance test without addition of oil was used. Adopted as a test sample, the adhesion performance test was performed under the same test conditions as the adhesion performance test without addition of oil, and the adhesion performance was evaluated by the same method.

  (Oil-water separation performance test): 80 mL of a solution obtained by diluting each water-based lubricant composition for high-temperature plastic working shown in Tables 1A to 11A 10 times with pure water into a graduated cylinder (capacity: 100 mL), 20 mL of machine oil was put into the cylinder, shaken up and down 10 times, and allowed to stand for 1 minute. The liquid after standing was visually observed and evaluated as ○ when the oil-water separation performance was good, and x when the oil layer and the water layer were separated slowly in an emulsified state.

  (Test results): Lubricating performance (oil-free addition) test, lubrication performance (oil-added) test, adhesion performance test (oil-free addition), adhesion performance test (oil-added), oil-water separation performance test It shows in Table 1B-Table 11B. The test results shown in Tables 1B to 11B are evaluations of the aqueous lubricant compositions for high temperature plastic working corresponding to the respective high temperature plastic working aqueous lubricant compositions shown in Tables 1A to 11A.

  Referring to the results shown in Tables 1B to 11B, in the aqueous lubricant composition for high-temperature plastic working (containing ammonium diisodecyl sulfosuccinate) employed in the examples of the present invention, both oil-free and oil-added ones are used. The results of the lubrication performance test, the adhesion performance test, and the oil / water separation performance test are not significantly different, and it is recognized that even when oil is mixed, good lubrication performance (processing performance) is exhibited.

  On the other hand, in the high-temperature plastic working water-based lubricant composition employed in the comparative example for the examples of the present invention, in the case of the oil-free additive, the same lubricating performance and adhesion performance as the examples are recognized, In the case of the oil added one, it is recognized that both the lubrication performance and the adhesion performance are greatly reduced.

In comparative examples employing sodium 2-ethylhexylsulfosuccinate (U) or ammonium 2-ethylhexylsulfosuccinate (V), which are well-known surfactants as wetting agents, etc., good adhesion performance is obtained when no oil is added. However, when oil is added, the adhesion performance is greatly reduced, and compared with ammonium diisodecyl sulfosuccinate (lubricant performance recovery agent) used in the examples, the lubrication performance and adhesion performance are greatly reduced. Is recognized.

Claims (5)

It is an aqueous lubricant composition for high-temperature plastic working, comprising as a main component at least one lubricant of a lubricant comprising an organic compound or an inorganic compound as a lubricant component, and water functioning as a solvent or dispersion medium for the lubricant,
The high-temperature plastic working water-based lubricant composition contains a lubricating performance recovering agent that recovers the deterioration of the lubricating performance caused by the oil mixed in the high-temperature plastic working water-based lubricant composition,
An aqueous lubricant composition for high-temperature plastic working, characterized in that ammonium diisodecyl sulfosuccinate is employed as the lubricating performance recovering agent. The aqueous lubricant composition for high-temperature plastic processing according to claim 1,
The high-temperature plastic working water is characterized in that the content of ammonium diisodecyl sulfosuccinate, which is the lubricant for restoring lubricating performance, is in the range of 0.0001 to 5.0% by weight based on the entire aqueous lubricant composition for high-temperature plastic working. -Based lubricant composition. Lubricating performance of an aqueous lubricant composition for high-temperature plastic working comprising at least one lubricant of a lubricant containing an organic compound or an inorganic compound as a lubricating component and water functioning as a solvent or dispersion medium for the lubricant as main constituent components Is a method for restoring the lubricating performance,
To due to entrained oil the hot plastic working aqueous lubricant composition lubricating performance is lowered, diisodecyl sulfo ammonium succinate is lubrication performance recovery agent, or hot plastic working water system containing diisodecyl sulfo ammonium succinate A method for recovering lubricating performance of an aqueous lubricant composition for high-temperature plastic working, which comprises adding a lubricant composition. 4. The method for recovering the lubricating performance of an aqueous lubricant composition for high-temperature plastic working according to claim 3, wherein the aqueous lubricant composition for high-temperature plastic working, which is a target for recovering the lubricating performance, is diisodecyl sulfosuccinate, which is the lubricating performance recovering agent. A method for recovering lubricating performance of an aqueous lubricant composition for high-temperature plastic working, which does not contain ammonium acid. 4. The method for recovering the lubricating performance of an aqueous lubricant composition for high-temperature plastic working according to claim 3, wherein the aqueous lubricant composition for high-temperature plastic working, which is a target for recovering the lubricating performance, is diisodecyl sulfosuccinate, which is the lubricating performance recovering agent. A water-based lubricant composition for high-temperature plastic working, characterized by being a water-based lubricant composition for high-temperature plastic working, which contains ammonium acid but has a reduced lubricating performance due to a large amount of mixed oil. Lubricating performance recovery method.