JPH0334415B2 - - Google Patents
Info
- Publication number
- JPH0334415B2 JPH0334415B2 JP8744186A JP8744186A JPH0334415B2 JP H0334415 B2 JPH0334415 B2 JP H0334415B2 JP 8744186 A JP8744186 A JP 8744186A JP 8744186 A JP8744186 A JP 8744186A JP H0334415 B2 JPH0334415 B2 JP H0334415B2
- Authority
- JP
- Japan
- Prior art keywords
- coating
- mold
- weight
- solvent
- coating agent
- 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.)
- Expired
Links
- 239000011248 coating agent Substances 0.000 claims description 80
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 22
- 239000002904 solvent Substances 0.000 claims description 18
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 16
- 238000005266 casting Methods 0.000 claims description 16
- 229910001208 Crucible steel Inorganic materials 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 10
- 239000011230 binding agent Substances 0.000 claims description 7
- 239000011812 mixed powder Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 description 43
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 22
- 239000004576 sand Substances 0.000 description 17
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 230000004927 fusion Effects 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 229910052845 zircon Inorganic materials 0.000 description 5
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 5
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 230000001476 alcoholic effect Effects 0.000 description 3
- 239000000440 bentonite Substances 0.000 description 3
- 229910000278 bentonite Inorganic materials 0.000 description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical group O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 3
- 239000008119 colloidal silica Substances 0.000 description 3
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052863 mullite Inorganic materials 0.000 description 3
- 239000005011 phenolic resin Substances 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 235000013312 flour Nutrition 0.000 description 2
- 239000005350 fused silica glass Substances 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000000935 solvent evaporation Methods 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- ULUAUXLGCMPNKK-UHFFFAOYSA-N Sulfobutanedioic acid Chemical compound OC(=O)CC(C(O)=O)S(O)(=O)=O ULUAUXLGCMPNKK-UHFFFAOYSA-N 0.000 description 1
- 241000779819 Syncarpia glomulifera Species 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 102000011759 adducin Human genes 0.000 description 1
- 108010076723 adducin Proteins 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000001739 pinus spp. Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- -1 siyamoto Inorganic materials 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 229940036248 turpentine Drugs 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Landscapes
- Mold Materials And Core Materials (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、鋳鋼品鋳造用砂型のチル（冷し金）
に使用される塗型剤に関する。[Detailed Description of the Invention] [Industrial Field of Application] The present invention is directed to the chilling of sand molds for casting steel products.
The present invention relates to a mold coating agent used for.
鋳鋼品の鋳造用砂型内には、鋳造方案上、チル
が設置される。チルは、鋳鉄または炭素鋼などか
らなるメタルブロツクであり、砂型内に鋳込まれ
た鋳鋼溶湯の冷却凝固過程における指向性凝固を
促進し、引け巣などの鋳造欠陥のない健全な鋳鋼
品を得る目的で、鋳鋼品の形状・サイズに応じて
砂型内の適宜の個所に設置される。
A chill is installed in the sand mold for casting steel products due to the casting method. Chill is a metal block made of cast iron or carbon steel, which promotes directional solidification during the cooling and solidification process of molten cast steel cast in a sand mold, resulting in sound cast steel products without casting defects such as shrinkage cavities. For this purpose, it is installed at an appropriate location within the sand mold depending on the shape and size of the cast steel product.
砂型は一般にその使用に際して予め塗型膜が塗
設される。塗型膜は、耐火物粒子を含む塗型剤
（スラリー）をスプレーや刷子塗り等で塗布し乾
燥固化した耐火性塗膜であり、砂型の表面および
砂型に設置されたチルに対する鋳鋼溶湯の接触を
遮断し、その融着・焼着きを防止すると共に鋳鋼
鋳物に平滑・美麗な鋳肌を付与する役目を有して
いる。 Sand molds are generally coated with a coating film before use. The coating film is a fire-resistant coating film that is made by applying a coating agent (slurry) containing refractory particles by spraying or brushing, and then drying and solidifying it. It has the role of blocking and preventing fusion and seizure, as well as imparting a smooth and beautiful casting surface to steel castings.
上記塗型剤は、ジルコンフラワー、アルミナ、
シヤモツト、ムライト、クロマイトサンド、溶融
シリカ等の耐火物粉末を骨材とし、これに粘結剤
を加えると共に、溶剤で塗布で塗布作業に適した
濃度に調整した塗料であり、水を溶剤とする水性
塗型剤とアルコール類（メタノール、エタノー
ル、イソプロパノール等）を溶剤とするアルコー
ル性塗型剤とに大別される。粘結剤は、塗型膜の
耐火物粒子を結着し膜面の強化、緻密性を得るた
めに少量加えられる添加剤であり、水性塗型剤で
はベントナイト、木節粘土、コロイダルシリカ
等、アルコール性塗型剤ではフエノールレジン等
がそれぞれ使用される。 The above coating agents include zircon flower, alumina,
This is a paint that uses refractory powder such as siyamoto, mullite, chromite sand, and fused silica as aggregate, adds a binder to this, and adjusts the concentration to be suitable for application by applying it with a solvent, and uses water as the solvent. They are broadly divided into water-based coating agents and alcoholic coating agents that use alcohols (methanol, ethanol, isopropanol, etc.) as a solvent. A binder is an additive that is added in small amounts to bind the refractory particles of the coating film, strengthen the film surface, and obtain denseness. Phenol resin and the like are used as alcohol-based coating agents.
塗型剤における骨材に対する塗型剤や溶剤の添
加・濃度調整等の組成調合については、塗布方法
（スプレー塗布、刷子塗り等）や使用機器・用具、
砂型温度（例えば予熱の有無）、所望の塗膜厚さ
等を含む個々の具体的塗布条件に応じて任意に設
定される。また、塗布後の溶剤蒸発、乾燥固化等
の塗布作業能率等の点から塗布作業に際して砂型
の予熱が施されることも多い。なお、塗型膜の溶
剤蒸発、乾燥固化等の塗布作業性の点からアルコ
ール性塗型剤が多く使用されるが、近時は水性の
ジルコン系塗型剤等が、耐焼着性にすぐれている
こと、アルコール性のものに比べて作業環境の汚
染が少ないこと等により、例えば有機系の自硬性
鋳型等にも多く使用されるようになつている。 Regarding the composition of the coating agent, such as addition and concentration adjustment of the coating agent and solvent to the aggregate, the application method (spray coating, brush coating, etc.), the equipment and tools used,
It is arbitrarily set according to individual specific coating conditions including sand mold temperature (for example, whether or not to preheat), desired coating film thickness, and the like. Further, from the standpoint of efficiency of coating operations such as solvent evaporation and drying and solidification after coating, the sand mold is often preheated during the coating operation. Alcohol-based coating agents are often used from the viewpoint of coating workability such as solvent evaporation and drying solidification of the coating film, but recently water-based zircon-based coating agents have been used as they have excellent anti-seizing properties. Due to the fact that it is less polluting to the working environment than alcohol-based molds, it is increasingly being used, for example, in organic self-hardening molds.
従来の塗型剤は、砂型等の耐火物に対する塗型
剤として使用する場合は所期の塗型性能を示す
が、チルの塗型剤として使用した場合の塗型性能
は十分と言えない。それは、チルの熱膨張係数
と、その表面に塗布された塗型膜との熱膨張係数
との差が大きいため、鋳鋼溶湯の鋳込み時に塗型
膜に亀裂・剥離が生じ易いからである。メタルブ
ロツクであるチルは、砂型に比し鋳鋼溶湯の融
着・焼着きが生じ易いので、その表面の塗型膜が
損傷をうけ鋳鋼溶湯が直接々触すると著しし融
着・焼着きを避けることができない。
Conventional mold coating agents exhibit desired mold coating performance when used as mold coating agents for refractory materials such as sand molds, but their mold coating performance cannot be said to be sufficient when used as chill mold coating agents. This is because there is a large difference between the coefficient of thermal expansion of the chill and the coefficient of thermal expansion of the coating film applied to the surface of the chill, so that the coating film is likely to crack or peel during pouring of molten cast steel. Chill, which is a metal block, is more likely to cause fusion and seizure of molten steel than sand molds, so if the coating film on its surface is damaged and molten steel comes into direct contact with it, fusion and seizure will occur. It cannot be avoided.
なお、耐焼着き性にすぐれているとされる水性
のジルコン系塗型剤をチルに使用した場合には、
チルに赤銹（FeO、Fe2O3、Fe（OH）3など）が発
生するため、これをチル用塗型剤として実用する
ことはできない。チルに赤銹が発生した状態で、
鋳鋼溶湯を砂型に鋳込むと、溶湯の熱で赤銹の
FeO、Fe2O3、Fe（OH）3等が分解し、生成したO2
ガスやCOガスが鋳鋼鋳造品内に侵入し、ブロー
ホール等の重大な鋳造欠陥を発生させるからであ
る。 In addition, if a water-based zircon-based coating agent, which is said to have excellent seizure resistance, is used for chilling,
Since red rust (FeO, Fe 2 O 3 , Fe(OH) 3, etc.) is generated in chill, it cannot be used as a coating agent for chill. With red rust occurring in the chill,
When molten steel is poured into a sand mold, the heat of the molten metal causes red rust to form.
O 2 generated by decomposition of FeO, Fe 2 O 3 , Fe(OH) 3 , etc.
This is because gas and CO gas can enter the steel casting and cause serious casting defects such as blowholes.
本発明は、上記問題点を解決するための改良さ
れたチル用塗型剤を提供しようとするものであ
る。 The present invention aims to provide an improved chill coating agent to solve the above problems.
本発明の鋳鋼鋳物のチル用塗型剤は、骨材に粘
結剤を添加し水またはアルコール類を溶剤として
適宜濃度に調整した塗型剤において、骨材が耐火
物粉末とアルミニウム粉末との混合粉末であり、
その混合粉末に占めるアルミニウム粉末は５〜20
重量％であることを特徴としている。
The coating agent for chilling cast steel castings of the present invention is a coating agent in which a binder is added to the aggregate and the concentration is adjusted to an appropriate level using water or alcohol as a solvent, and the aggregate is composed of refractory powder and aluminum powder. It is a mixed powder,
Aluminum powder accounts for 5 to 20 in the mixed powder
It is characterized by being % by weight.
本発明の塗型剤を用いてチル表面に塗設された
塗型膜は、鋳鋼溶湯が鋳込まれると、その溶湯の
熱でアルミニウム粉末が溶融することにより、ア
ルミニウムと耐火物粒子との複合皮膜となり、ま
たアルミナ（Al2O3）が生成する。塗型膜は、こ
の複合皮膜化とアルミナの生成により強化され、
チルとの熱膨張率の差に因る亀裂・剥離を生じる
ことなく、チルと鋳鋼品との融着・焼着きを未然
に防止する。 The coating film applied to the chilled surface using the coating agent of the present invention is formed by forming a composite of aluminum and refractory particles by melting the aluminum powder with the heat of the molten steel when the molten steel is poured. A film is formed, and alumina (Al 2 O 3 ) is also generated. The coating film is strengthened by this composite film and the formation of alumina,
Prevents fusion and seizure between the chill and the cast steel product without causing cracks or peeling due to the difference in thermal expansion coefficient between the chill and the cast steel.
また、アルミニウム粉末は、強力な脱酸作用を
有しているので、チルの表面に赤銹が存在してい
ても、赤銹の分解により生成するガスをAl2O3の
形で固定化することにより、赤銹に起因するブロ
ーホールの発生を未然に防止する効果を併せ有す
る。 In addition, aluminum powder has a strong deoxidizing effect, so even if red rust is present on the surface of the chiller, the gas generated by the decomposition of red rust will be fixed in the form of Al 2 O 3 . This also has the effect of preventing the occurrence of blowholes caused by red rust.
本発明において、耐火物粉末とアルミニウム粉
末の混合粉末からなる骨材におけるアルミニウム
粉末の配合量を５重量％以上とするのは、上記の
アルミニウムによる塗型膜の強化、および脱酸作
用に伴うブローホール発生防止の効果を確保する
ためである。また、アルミニウム粉末の配合量の
上限を20重量％に規定したのは、それを超える
と、塗型膜の耐火性が低下し、チルに対する塗型
効果が減じることになるからである。 In the present invention, the content of aluminum powder in the aggregate made of a mixed powder of refractory powder and aluminum powder is set to 5% by weight or more to strengthen the coated film with the aluminum described above and to blow the mold due to the deoxidizing effect. This is to ensure the effect of preventing hole generation. Furthermore, the upper limit of the amount of aluminum powder is set at 20% by weight because if it exceeds this, the fire resistance of the coating film will decrease and the coating effect on chill will be reduced.
アルミニウム粉末が配合される耐火物粉末は、
従来より塗型剤の骨材として使用されているもの
と同様の耐火物粉末、例えばジルコン、アルミ
ナ、シヤモツト、ムライト、クロマイトサンド、
溶融けい砂等であり、所望により２種以上の粉末
が混合使用される。 Refractory powder containing aluminum powder is
Refractory powders similar to those conventionally used as aggregates for coating agents, such as zircon, alumina, siyamoto, mullite, chromite sand,
It is fused silica sand, etc., and two or more kinds of powders may be mixed and used if desired.
本発明の塗型剤はアルコール類を溶剤とするア
ルコール性塗型剤、または水を溶剤とする水性塗
型剤として調製される。水を溶剤として差支えな
いのは、その塗布によりチル表面に赤銹が発生し
ても、前記のようにその塗型膜に含まれているア
ルミニウム粉末の強力な脱酸作用により、赤銹に
起因する鋳造欠陥の発生を防止することができる
からである。その塗型剤の骨材（耐火物粉末とア
ルミニウム粉末との混合物）に添加される粘結剤
および溶剤は従来の塗型剤のそれと異ならず、粘
結剤は、水性塗型剤ではベントナイト、木節粘
土、コロイダルシリカ等、アルコール性塗型剤で
はフエノールレジン等を使用すればよく、またア
ルコール類（メタノール、エタノール、イソプロ
パノール等）を溶剤とする場合、所望により粘度
調節等のためにエステル類やキシレン、ミネラル
ターペン等を溶剤として加えてよいことも従来の
それと同様である。 The mold coating agent of the present invention is prepared as an alcoholic mold coating agent using alcohol as a solvent, or an aqueous mold coating agent using water as a solvent. The reason why water can be used as a solvent is that even if red rust occurs on the chilled surface due to its application, the strong deoxidizing effect of the aluminum powder contained in the coating film prevents red rust from forming. This is because it is possible to prevent the occurrence of casting defects. The binder and solvent added to the aggregate (mixture of refractory powder and aluminum powder) of the coating are not different from those of conventional coatings, and the binder is bentonite in water-based coatings; For alcohol-based coating agents such as Kibushi clay and colloidal silica, phenol resin may be used.If alcohols (methanol, ethanol, isopropanol, etc.) are used as a solvent, esters may be used to adjust the viscosity, etc., if desired. Similarly to the conventional method, solvents such as xylene, mineral turpentine, etc. may be added as a solvent.
本発明のチル用塗型剤の調製方法においては、
前記のように耐火物粉末とアルミニウム粉末の混
合物を骨材として使用する点を除いて、従来の水
性またはアルコール性塗型剤の調製と異なるとこ
ろはなく、その組成調合等は、予定された塗布方
式（スプレー塗布、刷子塗り等）や、所望の塗型
膜厚、チルの表面温度（予熱の有無等）、その他
の塗布条件に応じて常法に従つて行うことがで
き、粘結剤の添加・溶剤の濃度調整等に特別の制
限や条件が付加されることはない。所望によりチ
クソトロピー性の付与、骨材の沈降抑制、あるい
は塗布性の改善等のために界面活性剤、増粘剤等
を加えてよいことも通常の塗型剤を調製する場合
と異ならない。 In the method for preparing a chill coating agent of the present invention,
As mentioned above, there is no difference from the preparation of conventional water-based or alcohol-based mold coatings, except that a mixture of refractory powder and aluminum powder is used as the aggregate, and the composition and formulation are based on the planned application. It can be carried out according to conventional methods depending on the coating method (spray coating, brush coating, etc.), desired coating film thickness, chill surface temperature (preheating or not, etc.), and other coating conditions. There are no special restrictions or conditions added to additives, solvent concentration adjustment, etc. It is also the same as when preparing a usual mold coating agent that surfactants, thickeners, etc. may be added to impart thixotropy, suppress sedimentation of aggregates, or improve coating properties, if desired.
また、本発明の塗型剤を使用して行うチル表面
の塗型膜の塗設要領にも特別の処理や操作は不要
であり、スプレー塗布や刷子塗り等の一般的な塗
布方式を用いて１回または複数回の塗布作業を行
い、溶剤を蒸発し、乾燥させて所定層厚（例えば
0.2〜0.8mm）の塗型膜を得る。その塗型膜の塗設
作業能率の向上等のために必要に応じて予熱（例
えば100〜200℃）が施される。 In addition, no special treatment or operation is required for applying the coating film on the chilled surface using the coating agent of the present invention, and general coating methods such as spray coating and brush coating can be used. Apply one or more coats, evaporate the solvent and dry to achieve the desired layer thickness (e.g.
0.2 to 0.8 mm) to obtain a coated film. Preheating (for example, 100 to 200° C.) is performed as necessary to improve the efficiency of coating the coating film.
〔〕 塗型剤の調製
次に３種の塗型剤(A)、(B)および(C)を調製。塗
型剤Ａ（アルコール性）および(B)（水性）は本
発明例であり、塗型剤(C)（水性）はアルミニウ
ム粉末配合量が不足する比較例である。いずれ
も耐火物粉末は、ジルコンフラワー＋ムライト
フラワー（粒径：325メツシユ以下）であり、
アルミニウム粉末の粒径は0.1mm（150メツシ
ユ）以下である。また、配合量を示す％は重量
％である。
[] Preparation of mold coating agents Next, three types of mold coating agents (A), (B) and (C) were prepared. Coating agents A (alcoholic) and (B) (aqueous) are examples of the present invention, and coating agent (C) (aqueous) is a comparative example in which the amount of aluminum powder blended is insufficient. In both cases, the refractory powder is zircon flour + mullite flour (particle size: 325 mesh or less),
The particle size of the aluminum powder is 0.1 mm (150 mesh) or less. In addition, % indicating the blending amount is % by weight.
塗型剤(A)〔発明例〕
骨材中のアルミニウム配合量：20重量％
溶剤：骨材100重量部にエタノール90重量部を
添加。Coating agent (A) [Invention example] Amount of aluminum in aggregate: 20% by weight Solvent: 90 parts by weight of ethanol was added to 100 parts by weight of aggregate.
粘結剤：フエノールレジン５重量％
界面活性剤：ジアルキルスルホコハク酸ナトリ
ウム0.02重量％
塗型剤(B)〔発明例〕
骨材中のアルミニウム配合量：５重量％
溶剤：骨材100重量部に水95重量部添加。 Binder: 5% by weight of phenolic resin Surfactant: 0.02% by weight of sodium dialkyl sulfosuccinate Coating agent (B) [Invention example] Amount of aluminum in aggregate: 5% by weight Solvent: 100 parts by weight of aggregate with water Added 95 parts by weight.
粘結材：ベントナイト ４重量％ コロイダルシリカ 0.5重量％ 塗型剤(C)〔比較例〕 骨材中のアルミニウム配合量：２重量％ 溶剤：骨材100重量部に水95重量部添加。 Caking agent: bentonite 4% by weight Colloidal silica 0.5% by weight Coating agent (C) [Comparative example] Aluminum content in aggregate: 2% by weight Solvent: Add 95 parts by weight of water to 100 parts by weight of aggregate.
粘結材：ベントナイト ４重量％
コロイダルシリカ 0.5重量％
〔〕 チル表面への塗布および砂型鋳造
塗型剤(A)、(B)、(C)のそれぞれを使用して鋳鋼
品鋳造用砂型内に設置されたチル（鋳鋼ブロツ
ク，50×50×20，mm）の表面（塗布時温度：約
100℃）を刷子塗りして塗型膜(A)、(B)、(C)を形
成した、膜厚はいずれも0.3〜0.5mmである。な
お、砂型表面にはアルミニウム粉末を含まない
前記塗型剤(C)と同じものを用いて塗型膜（膜
厚：約0.3〜0.5mm）を形成した。 Caking agent: Bentonite 4% by weight Colloidal silica 0.5% by weight [] Application to chilled surface and sand mold casting Using coating agents (A), (B), and (C) respectively, apply in a sand mold for casting steel products. The surface of the installed chill (cast steel block, 50 x 50 x 20, mm) (temperature during application: approx.
The coated films (A), (B), and (C) were formed by brush coating (100°C), and the thickness of each film was 0.3 to 0.5 mm. A coating film (film thickness: about 0.3 to 0.5 mm) was formed on the surface of the sand mold using the same mold coating agent (C) as described above, which did not contain aluminum powder.
上記砂型内に鋳鋼溶湯を注湯し（注湯温度：
1560℃）、鋳鋼品（単重：800Kg）(A)、(B)および
(C)を得た。 Pour the molten steel into the sand mold (pouring temperature:
1560℃), cast steel products (unit weight: 800Kg) (A), (B) and
I got (C).
チル表面に本発明の塗型剤(A)、(B)による塗型
膜を形成して鋳造された鋳鋼品(A)および(B)は、
チル表面の融着・焼着きは全くなく、その部分
の鋳肌は平滑美麗であり、またブローホールの
発生も皆無であつた。一方、アルミニウム粉末
を含まない塗型剤(C)による塗型膜を形成して鋳
造された鋳鋼品(C)のチル部分には軽微である
が、焼着きが生じ、また内部に若干のブローホ
ールが認められた。 Cast steel products (A) and (B) were cast by forming coating films of the coating agents (A) and (B) of the present invention on the chilled surface.
There was no fusion or burning on the chilled surface, and the casting surface in that area was smooth and beautiful, and there were no blowholes. On the other hand, a cast steel product (C) that was cast with a mold coating formed using a mold coating agent (C) that does not contain aluminum powder has some burning, although it is slight, and some blowing inside. Hall was recognized.
本発明のチル用塗型剤は、チルの表面に、鋳鋼
溶湯の融着・焼着き防止性能にすぐれた安定な塗
型膜を形成することができ、またチルにブローホ
ールの原因となる赤銹が存在してもこれを無害な
ものとする等、従来材を凌ぐ塗型性能を有してい
る。
The coating agent for chilling of the present invention can form a stable coating film on the surface of the chiller that has excellent performance in preventing fusion and sticking of molten cast steel, and it also has the ability to form a stable coating film on the surface of the chiller that has excellent performance in preventing fusion and seizure of molten cast steel. It has coating performance superior to conventional materials, such as making rust harmless even if it exists.
従つて、本発明の塗型剤を使用することによ
り、チルの焼着きやブローホール等の鋳造欠陥を
防止し、表面性状および内部品質ともにすぐれた
鋳鋼品を鋳造することができ、かつ鋳造歩留りを
高めることができる。 Therefore, by using the mold coating agent of the present invention, casting defects such as chill burning and blowholes can be prevented, and cast steel products with excellent surface and internal quality can be cast, and the casting yield can be improved. can be increased.
Claims (1)
を溶剤として適宜濃度に調整した塗型剤におい
て、骨材が耐火物粉末とアルミニウム粉末との混
合粉末であり、その混合粉末に占めるアルミニウ
ム粉末は５〜20重量％であることを特徴とする鋳
鋼鋳物のチル用塗型剤。1. In a mold coating agent in which a binder is added to aggregate and the concentration is adjusted to an appropriate concentration using water or alcohol as a solvent, the aggregate is a mixed powder of refractory powder and aluminum powder, and the aluminum powder accounts for the mixed powder. A mold coating agent for chilling cast steel castings, characterized in that the amount is 5 to 20% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8744186A JPS62244546A (en) | 1986-04-15 | 1986-04-15 | Coating agent for chilling cast steel castings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8744186A JPS62244546A (en) | 1986-04-15 | 1986-04-15 | Coating agent for chilling cast steel castings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62244546A JPS62244546A (en) | 1987-10-24 |
| JPH0334415B2 true JPH0334415B2 (en) | 1991-05-22 |
Family
ID=13914943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8744186A Granted JPS62244546A (en) | 1986-04-15 | 1986-04-15 | Coating agent for chilling cast steel castings |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62244546A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5582874B2 (en) * | 2010-05-31 | 2014-09-03 | 花王株式会社 | Coating agent composition |
| CN106077444A (en) * | 2016-07-15 | 2016-11-09 | 江苏迅隆科技发展有限公司 | A kind of Quench coating of novel replacement chill usefulness and preparation method thereof |
| CN107855460B (en) * | 2017-11-08 | 2020-10-30 | 蚌埠市华鼎机械科技有限公司 | Casting coating for surface of lead-acid storage battery cast-welding machine |
-
1986
- 1986-04-15 JP JP8744186A patent/JPS62244546A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62244546A (en) | 1987-10-24 |
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