AU709145B2 - Use of a steel for cutting tool holders - Google Patents
Use of a steel for cutting tool holders Download PDFInfo
- Publication number
- AU709145B2 AU709145B2 AU34693/97A AU3469397A AU709145B2 AU 709145 B2 AU709145 B2 AU 709145B2 AU 34693/97 A AU34693/97 A AU 34693/97A AU 3469397 A AU3469397 A AU 3469397A AU 709145 B2 AU709145 B2 AU 709145B2
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- Australia
- Prior art keywords
- max
- steel
- use according
- steel contains
- traces
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 63
- 239000010959 steel Substances 0.000 title claims abstract description 63
- 238000005520 cutting process Methods 0.000 title claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000012535 impurity Substances 0.000 claims abstract description 9
- 229910052742 iron Inorganic materials 0.000 claims abstract description 5
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 5
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 9
- 239000005864 Sulphur Substances 0.000 description 9
- 238000005496 tempering Methods 0.000 description 8
- 229910052799 carbon Inorganic materials 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 6
- 239000011651 chromium Substances 0.000 description 5
- 238000003754 machining Methods 0.000 description 5
- 239000011572 manganese Substances 0.000 description 5
- 229910052750 molybdenum Inorganic materials 0.000 description 5
- 239000011575 calcium Substances 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 4
- 229910052721 tungsten Inorganic materials 0.000 description 4
- 239000010937 tungsten Substances 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 229910052748 manganese Inorganic materials 0.000 description 3
- 229910052720 vanadium Inorganic materials 0.000 description 3
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 239000010955 niobium Substances 0.000 description 2
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical group [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 2
- 239000012925 reference material Substances 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 150000003568 thioethers Chemical class 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000997 High-speed steel Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 229910002065 alloy metal Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical class [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- LKIUTDSMFUMDHS-UHFFFAOYSA-N calcium oxygen(2-) silicon(4+) Chemical class [Si+4].[O-2].[Ca+2].[O-2].[O-2] LKIUTDSMFUMDHS-UHFFFAOYSA-N 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
- Scissors And Nippers (AREA)
- Heat Treatment Of Steel (AREA)
- Turning (AREA)
Abstract
The invention relates to a steel containing in weight-%: 0.3-0.5 C, from traces to max. 1.5 Si, 0.2-1.5 Mn, max. 0.03 P, preferably max. 0.025 P, 0.01-0.2 S, 4-7 Cr, from traces to max. 1 Ni, 0.5-2.0 Mo, which can completely or partly be replaced by the double amount W, from traces to max. 1 Co, 0.2-1.5 V, from traces to max. 0.5 Nb, from traces to a total of max. 0.2 % of rare earth metals, balance essentially iron, impurities and accessory elements in normal amounts, as a material for cutting tool holders.
Description
WO 97/49838 PCT/SE97/01112 USE OF A STEEL FOR CUTTING TOOL HOLDERS TECHNICAL FIELD The invention relates to the use of a steel with a specific composition, as a material for cutting tool holders.
BACKGROUND OF THE INVENTION A cutting tool holder is the body on or in which the tool bit, that is active during the machining operation, is attached. Cutter- and drill bodies are typical cutting tool holders, which are provided with active machining carbide elements. The material in such cutting tool holders is usually a steel which is referred to as holder steel in this technical field. A number of requirements are raised upon holder steels: Cutting tool holders, such as cutter- and drill bodies, often have a complicated shape, and the most machining of the tool holder body is made in the soft-annealed condition of the steel. Nevertheless, it must be possible to air-harden the material without significant changes of the dimensions during the hardening operation.
Some cutting tool holders are tough-hardened, while those surfaces against which the carbide bits are attached are induction-hardened. Therefore it must be possible for the material to be induction-hardened.
Machining by cutting is performed at ever increasing machining rates, which results in the cutting tool holder becoming very hot. The material therefor has to have good hot-hardness.
Some types of cutting tool holders, such as certain drill bodies with carbide tips which are attached by soldering, are PVD-coated subsequent to the hardening operation in order that the cuttings of the borings shall not wear out the drilling spiral in the drill body. Therefore, it must be possible to PVD-coated the material without any significant hardness reduction.
Some types of cutting tool holders, such as cutter bodies, are subjected to high pulsating loads when they are in use. The material therefor must have good mechanical features, including a good toughness and fatigue strength.
WO 97/49838 PCT/SE97/01112 2 -Many types of cutting tool holders have a very complicated shape. Small threaded holes, and long, narrow borings frequently occur. Therefore the material shall have a good machinability, particularly when high speed steel tools are used.
Low or medium alloyed tool steels are used as materials for cutting tool holders. The composition of a number of typical holder steels are listed in the table below. Besides the element mentioned in the table, which refer to weight-%, the steels only contain iron, and impurities and accessory elements. None of the known holder steels satisfies the above specified requirements in a completely satisfactory way.
Reference C Si steel 1 0.52 0.3 2 0.42 0.3 3 1.0 1.5 4 0.45 0.28 0.55 0.28 6 0.51 0.30 7 0.40 0.27 8 0.50 1.12 9 0.36 0.22 Mn 0.8 0.8 0.8 0.64 0.75 0.39 0.81 1.0 0.77 S Cr max. 0.035 1.0 max. 0.035 max. 0.020 0.012 0.8 0.023 0.93 0.002 0.94 0.90 0.001 3.10 0.013 1.1 Ni 1.8 0.10 2.95 0.16 0.10 Mo V 1.15 0.25 S 0.015 0.25 0.88 0.49 0.17 DISCLOSURE OF THE INVENTION The invention suggests a steel alloy intended to be used as a material for cutting tool holders, which satisfies the said requirements more satisfactorily than the steels of prior art. The composition of the steel is given in the appending claims. The invention also relates to cutting tool holders made of the steel.
In the following, the importance of the individual elements and their mutual interaction will be explained. All percentages, which relate to the chemical composition of the steel, refer to weight-%.
Carbon shall exist in an amount of at least preferably at least 0.35%, suitably at least 0.37%, in order that the steel shall obtain a desired hardness and strength. The carbon content must not exceed preferably not exceed 0.45%, and suitably not WO 97/49838 PCT/SE97/01112 3 exceed 0.41%. At higher carbon contents, the steel can be too hard and brittle. Typically, the steel contains 0.39%C.
Silicon may exist in amounts from a trace amount to a maximum of but preferably the steel should contain at least 0.40% Si. The silicon exists in the steel in a dissolved state, but can also exist as silicon-calcium oxides, which in their turn are preferably modified by means of sulphur, which in the form of sulphides may cover the oxide and make it essentially plastic, wherein the said inclusions can function as a lubricating film when the steel is being machined. Preferably, the steel should not contain more than 1.2% Si. Preferred ranges are 0.7-0.9% Si or 0.6-0.8% Si. A typical (nominal) Si content is 0.7%.
Manganese shall exist in an amount of at least 0.2% in order to improve the tempering resistance of the steel and in order to prevent redbrittleness of the steel through the formation ofmaganese sulphides, when the steel contains higher amounts of sulphur. The steel however, shall not contain more than 1.5% maganese, preferably max. 1.0% Mn.
A particularly preferred range is 0.3-0.5% Mn. An optimal maganese content is 0.4%.
Sulphur shall exist in an amount of at least 0.01% in order to give the steel an adequate machinability. The steel shall not contain more than at most 0.2% S. If the sulphur content is higher, there is a risk that redbrittleness may occur, which can not be completely compensated by a correspondingly high content ofmaganese. Preferably, the steel should not contain more than max. 0.05% sulphur. A preferred content of sulphur lies in the range 0.01-0.03% S. A typical (nominal) sulphur content is 0.02%.
Chromium shall exist in the steel in an amount between 4 and 7% in order to give the steel a good hardenability. A preferred range is 4.5-5.5% Cr; typically 5.0% Cr.
Nickel is not a critical element in the steel, but can be tolerated in an amount up to 1%, preferably max. Molybdenum improves the hardenability of the steel and also its tempering resistance and hence its hot hardness and shall therefor exist in an amount of at least max.
A preferred range is 1.2% Mo, preferably 1.2-1.6% Mo. Typically, the steel contains 1.4% Mo. In principal, molybdenum can be replaced completely or partly by the double amount of tungsten. Tungsten, however, is an expensive alloy metal and it also WO 97/49838 PCT/SE97/01112 4 complicates the handling of return scrap. Therefore, tungsten should be avoided in amounts higher than amounts recognised as impurities.
Cobalt, for the same reason as tungsten, should not exist in the steel but can be tolerated in amounts up to max. preferably max. 0.05%.
Vanadium is favourable for the tempering resistance and the wear strength of the steel and shall exist in the steel in an amount of at least but not exceed Preferably, the vanadium content should lie between suitably between 0.8typically the content of vanadium is 0.95%.
Possibly, the steel can also contain oxygen and calcium in functional amounts, more particularly 50-100 ppm oxygen and 5-75 ppm calcium in order to interact to form calcium oxides, which are modified by means of sulphur as has been mentioned in the foregoing.
Niobium forms primary carbonitrides which are difficult to dissolve and shall not exist in amounts above Preferably, niobium should not exist in amounts above impurity level. Also titanium, zirconium, aluminium and other strong carbide and/or nidrideformers are impurities which are not desired and therefore shall not exist in amounts above impurity level.
Rare earth metals, such as cerium, lanthanum and others can possibly be added to the steel in order to afford the steel isotropic features, optimal machinability, good mechanical features, and a good hot-workability. The total content of the rare earth metals can amount to max. preferably max. 0.2%.
The nominal (typical) composition has the following specification: 0.37-0.41 C, 0.40- 1.20 Si, 0.30-0.50 Mn, max. 0.025 P, 0.010-0.030 S, 5.00-5.30 Cr, max. 0.25 Ni, 1.25- 1.50 Mo, max. 0.20 W, max. 0.20 Co, 0.90-1.00 V, max. 0.005 Ti, max. 0.030 Nb, max.
0.25 Cu, max. 0.020 Al, 5-50 ppm Ca, 60-90 ppm 0, balance iron.
The steel is hardened from an austenitizing temperature between 860 and 1100°C, preferably between 960 and 1050°C, wherein the hardening temperature is chosen within said range depending on the desired hardness. When the steel is hardened from a temperature within the lower part of the range 960 1050°C, more particularly from a temperature of 960 0 C or slightly above that temperature, it is possible to achieve a WO 97/49838 PCT/SE97/01112 hardness of 48 HRC while it is possible to achieve a hardness of 54 HRC if the steel is hardened from a temperature within the upper part of the range 960 1050 0 C, i.e. at or near 1050°C, prior to tempering. Tempering can be performed either as low temperature tempering from a temperature between 180- 250°C, or as high temperature tempering from a temperature between 550-600oC in order to provide high hardness in combination with good toughness. The drawing shows typical tempering curves for a steel according to the invention after hardening from different temperatures between 960 and 1025 0
C.
The invention shall be explained more in detail in the following with reference to performed experiments.
PERFORMED
EXPERIMENTS
A great number of steel heats having compositions according to Table 1 were manufactured. The given contents of the elements of the compositions are mean values of measurements made on different places in the ingots that were manufactured. In Table 1, the composition of reference material, SS 2242, has also been included. The contents of the reference material are nominal contents. The content of phosphorus, sulphur, aluminium, nitrogen, calcium, and oxygen have not been mentioned. For all the materials, the balance is iron and impurities which can exist in normal amounts in addition to those impurities or accessory elements that are mentioned in the table.
In Table 1, results from machinability tests which were performed on material in the soft annealed state are also shown. The mentioned values refer to the periphery speed of the drill (mean value) in which the drill is rotated so that the total length of 1000 mm shall be achieved before the drill is worn out. Also, the number of borings that are possible to uim at a drilling rate of 30 m/min, before the drill is worn out, are stated in the table.
Table 1 ,itl
Claims (13)
1. Use of a steel containing in weight-%: 0.3-0.5 C, from traces to max. 1.5 Si, 0.2-1.5 Mn, max. 0.03 P, preferably max. 0.025 P, 0.01-0.2 S,
4-7 Cr, from traces to max. 1 Ni, 0.5-2.0 Mo, which can completely or partly be replaced by the double amount W, from traces to max. 1 Co, 0.2-1.5 V, from traces to max. 0.5 Nb, from traces to total max. 0.2% of rare earth metals, balance essentially iron, impurities and accessory elements in normal amounts, as a material for cutting tool holders. 2. Use according to claim 1, wherein the steel contains 0.35-0.45 C. 3. Use according to claim 2, wherein the steel contains 0.37-0.41 C. 4. Use according to claim 1, wherein the steel contains 0.4-1.2 Si.
5. Use according to claim 4, wherein the steel contains 0.7-0.9 Si.
6. Use according to claim 4, wherein the steel contains 0.6-0.8 Si.
7. Use according to claim 1, wherein the steel contains 0.2-1.0 Mn.
8. Use according to claim 7, wherein the steel contains 0.3-0.5 Mn.
9. Use according to claim 1, wherein the steel contains 0.01-0.05, preferably 0.01-0.03 S. Use according to claim 1, wherein the steel contains 4.5-5-5 Cr. 8
11. Use according to claim 1, wherein the steel contains 1-2 Mo.
12. Use according to claim 11, wherein the steel contains 1.2-1.6 Mo.
13. Use according to claim 1, wherein the steel contains 0.6-1.3 V, preferably 0.8-1.1 V.
14. Use according to claim 1, wherein the steel contains 50-100 ppm oxygen and 5-75 ppm Ca. Use according to claim 1, wherein the steel contains a total of max. 0.4% of rare earth metals.
16. Cutting tool holder consisting of a steel with a composition according to any of the preceding claims.
17. A use according to claim 1 substantially as hereinbefore described with reference to the performed experiments. *.o 20 DATED: 19 April, 1999 PHILLIPS ORMO"E &FI Attorneys For: UDDEHOLM TOOLING AKTIEBOLAG S*
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9602494 | 1996-06-25 | ||
| SE9602494A SE507851C2 (en) | 1996-06-25 | 1996-06-25 | Use of a steel as a material for cutting tool holders |
| PCT/SE1997/001112 WO1997049838A1 (en) | 1996-06-25 | 1997-06-23 | Use of a steel for cutting tool holders |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| AU3469397A AU3469397A (en) | 1998-01-14 |
| AU709145B2 true AU709145B2 (en) | 1999-08-19 |
| AU709145C AU709145C (en) | 2001-10-18 |
Family
ID=20403138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU34693/97A Expired AU709145C (en) | 1996-06-25 | 1997-06-23 | Use of a steel for cutting tool holders |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0912773B1 (en) |
| JP (1) | JP4210331B2 (en) |
| CN (1) | CN1070929C (en) |
| AT (1) | ATE207977T1 (en) |
| AU (1) | AU709145C (en) |
| DE (1) | DE69707883T2 (en) |
| ES (1) | ES2164356T3 (en) |
| SE (1) | SE507851C2 (en) |
| WO (1) | WO1997049838A1 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2782465B1 (en) * | 1998-08-20 | 2000-11-10 | Stephane Badot | KNIFE FOR A KNIFE HOLDER OF A GRANULATING DEVICE FOR PLASTIC MATERIALS, AS WELL AS KNIFE HOLDER AND GRANULATING DEVICE COMPRISING SUCH A KNIFE |
| SE515624C2 (en) | 1999-11-02 | 2001-09-10 | Ovako Steel Ab | Air-curing low- to medium-carbon steel for improved heat treatment |
| WO2010011447A2 (en) * | 2008-07-24 | 2010-01-28 | Crs Holdings, Inc. | High strength, high toughness steel alloy |
| CN102212760A (en) * | 2011-06-10 | 2011-10-12 | 钢铁研究总院 | Steel with high toughness and ultrahigh strength |
| DK2896713T3 (en) | 2014-01-16 | 2016-06-06 | Uddeholms Ab | Stainless steel and a cutting tool body made of stainless steel |
| CA2936549C (en) | 2014-01-16 | 2022-02-08 | Uddeholms Ab | Stainless steel and a cutting tool body made of the stainless steel |
| CN105132827B (en) * | 2015-09-09 | 2017-03-29 | 南京工程学院 | A kind of high heat-intensity forged steel material for obtaining ultra tiny compound yardstick carbide |
| CN105714203B (en) * | 2016-04-20 | 2017-12-08 | 上海瀚氏模具成型有限公司 | A kind of preparation method of making Nano surface high-strength temperature-resistant steel mold |
| CN105734441B (en) * | 2016-04-20 | 2017-10-03 | 上海瀚氏模具成型有限公司 | A kind of preparation method of nanosizing low-alloy heat-resistant high-strength steel mould |
| CN105886933B (en) * | 2016-05-12 | 2021-04-30 | 天津钢研海德科技有限公司 | Hot work die steel with high tempering softening resistance and high toughness and manufacturing method thereof |
| TWI756226B (en) | 2016-06-30 | 2022-03-01 | 瑞典商伍德赫爾恩股份有限公司 | A steel for a tool holder |
| CN108385025A (en) * | 2018-04-09 | 2018-08-10 | 武汉科技大学 | A kind of Slab Deburring Machine blade and its manufacturing method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4459162A (en) * | 1979-12-03 | 1984-07-10 | Norstroem Lars Ake | Hot work steel |
| EP0569346A1 (en) * | 1992-05-06 | 1993-11-10 | BÖHLER YBBSTALWERKE Ges.m.b.H. | Hack saw blade with improved fatique strength under reversed bending stresses and improved cutting performance |
-
1996
- 1996-06-25 SE SE9602494A patent/SE507851C2/en not_active IP Right Cessation
-
1997
- 1997-06-23 EP EP97930936A patent/EP0912773B1/en not_active Expired - Lifetime
- 1997-06-23 WO PCT/SE1997/001112 patent/WO1997049838A1/en not_active Ceased
- 1997-06-23 AT AT97930936T patent/ATE207977T1/en active
- 1997-06-23 DE DE69707883T patent/DE69707883T2/en not_active Expired - Lifetime
- 1997-06-23 CN CN97195775A patent/CN1070929C/en not_active Expired - Lifetime
- 1997-06-23 ES ES97930936T patent/ES2164356T3/en not_active Expired - Lifetime
- 1997-06-23 JP JP50282998A patent/JP4210331B2/en not_active Expired - Lifetime
- 1997-06-23 AU AU34693/97A patent/AU709145C/en not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4459162A (en) * | 1979-12-03 | 1984-07-10 | Norstroem Lars Ake | Hot work steel |
| EP0569346A1 (en) * | 1992-05-06 | 1993-11-10 | BÖHLER YBBSTALWERKE Ges.m.b.H. | Hack saw blade with improved fatique strength under reversed bending stresses and improved cutting performance |
Also Published As
| Publication number | Publication date |
|---|---|
| DE69707883D1 (en) | 2001-12-06 |
| CN1222942A (en) | 1999-07-14 |
| AU3469397A (en) | 1998-01-14 |
| AU709145C (en) | 2001-10-18 |
| WO1997049838A1 (en) | 1997-12-31 |
| DE69707883T2 (en) | 2002-04-25 |
| SE9602494L (en) | 1997-12-26 |
| ES2164356T3 (en) | 2002-02-16 |
| JP4210331B2 (en) | 2009-01-14 |
| HK1020360A1 (en) | 2000-04-14 |
| EP0912773A1 (en) | 1999-05-06 |
| ATE207977T1 (en) | 2001-11-15 |
| CN1070929C (en) | 2001-09-12 |
| JP2000514500A (en) | 2000-10-31 |
| SE9602494D0 (en) | 1996-06-25 |
| EP0912773B1 (en) | 2001-10-31 |
| SE507851C2 (en) | 1998-07-20 |
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Legal Events
| Date | Code | Title | Description |
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| DA3 | Amendments made section 104 |
Free format text: THE NATURE OF THE AMENDMENT IS AS WAS NOTIFIED IN THE OFFICIAL JOURNAL DATED 19991007 |