JPS63248542A - Method for forming coating layer in mold - Google Patents
Method for forming coating layer in moldInfo
- Publication number
- JPS63248542A JPS63248542A JP8016987A JP8016987A JPS63248542A JP S63248542 A JPS63248542 A JP S63248542A JP 8016987 A JP8016987 A JP 8016987A JP 8016987 A JP8016987 A JP 8016987A JP S63248542 A JPS63248542 A JP S63248542A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- coating layer
- coating material
- mixture
- casting
- 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.)
- Granted
Links
- 239000011247 coating layer Substances 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims description 5
- 239000000463 material Substances 0.000 claims abstract description 24
- 239000000203 mixture Substances 0.000 claims abstract description 24
- 239000011248 coating agent Substances 0.000 claims abstract description 23
- 238000000576 coating method Methods 0.000 claims abstract description 23
- 239000010410 layer Substances 0.000 claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 11
- 239000003960 organic solvent Substances 0.000 claims abstract description 5
- 230000007062 hydrolysis Effects 0.000 claims abstract description 4
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 4
- 150000002736 metal compounds Chemical class 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 13
- 150000002902 organometallic compounds Chemical class 0.000 claims description 10
- 229910052574 oxide ceramic Inorganic materials 0.000 claims description 7
- 239000011224 oxide ceramic Substances 0.000 claims description 3
- 238000005266 casting Methods 0.000 abstract description 14
- 230000007797 corrosion Effects 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 7
- 229910000831 Steel Inorganic materials 0.000 abstract description 5
- 229910010293 ceramic material Inorganic materials 0.000 abstract description 5
- 239000010959 steel Substances 0.000 abstract description 5
- 239000000919 ceramic Substances 0.000 abstract description 4
- 239000003054 catalyst Substances 0.000 abstract description 3
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 6
- 239000003575 carbonaceous material Substances 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- XPGAWFIWCWKDDL-UHFFFAOYSA-N propan-1-olate;zirconium(4+) Chemical compound [Zr+4].CCC[O-].CCC[O-].CCC[O-].CCC[O-] XPGAWFIWCWKDDL-UHFFFAOYSA-N 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- RVDLHGSZWAELAU-UHFFFAOYSA-N 5-tert-butylthiophene-2-carbonyl chloride Chemical compound CC(C)(C)C1=CC=C(C(Cl)=O)S1 RVDLHGSZWAELAU-UHFFFAOYSA-N 0.000 description 3
- -1 alkyl metal compounds Chemical class 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 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 2
- 230000000694 effects Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052863 mullite Inorganic materials 0.000 description 2
- RPDAUEIUDPHABB-UHFFFAOYSA-N potassium ethoxide Chemical compound [K+].CC[O-] RPDAUEIUDPHABB-UHFFFAOYSA-N 0.000 description 2
- 229910052845 zircon Inorganic materials 0.000 description 2
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical class OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000004703 alkoxides Chemical class 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- SMZOGRDCAXLAAR-UHFFFAOYSA-N aluminium isopropoxide Chemical compound [Al+3].CC(C)[O-].CC(C)[O-].CC(C)[O-] SMZOGRDCAXLAAR-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052878 cordierite Inorganic materials 0.000 description 1
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- HHFAWKCIHAUFRX-UHFFFAOYSA-N ethoxide Chemical compound CC[O-] HHFAWKCIHAUFRX-UHFFFAOYSA-N 0.000 description 1
- 229910052839 forsterite Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910002076 stabilized zirconia Inorganic materials 0.000 description 1
Landscapes
- Mold Materials And Core Materials (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、鋳造用鋳型表面に、耐食、耐熱性を有するコ
ーティング層を容易に形成する方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for easily forming a coating layer having corrosion resistance and heat resistance on the surface of a casting mold.
（従来の技術）
鋳造用鋳型、例えば鉄、アルミニウム、銅等の合金又は
高密度炭素材からなる鋳型表面には該鋳型表面保護層及
び鋳造される鋳物表面が急冷されることによるチル化防
止用断熱層としてコーティング層が形成される。(Prior Art) A casting mold, for example, a mold surface made of an alloy of iron, aluminum, copper, etc. or a high-density carbon material, has a protective layer on the surface of the mold, and is used to prevent chilling caused by rapid cooling of the surface of the casting to be cast. A coating layer is formed as a heat insulating layer.
従来該コーティング層は、Ｓ、Ｃ系、 Ｚ、０２系及び
Ａｌ１２０３系等の耐火物粉末と骨材及び結合材を含む
スラリーを作製し、該スラリーをスプレー又は刷毛塗り
によって上記鋳型表面に塗布し、該スラリーを乾燥した
後、焼成するという方法により形成されていた。Conventionally, the coating layer is prepared by preparing a slurry containing refractory powder such as S, C, Z, 02, and Al1203, aggregate, and a binder, and applying the slurry to the surface of the mold by spraying or brushing. , the slurry was dried and then fired.
（発明が解決しようとする問題点）
ところで、Ｓ、Ｃ系、 Ｚ、０２系及び＋ｌ ２０３系
等酸化物系セラミック材を含むコーティング層は、その
焼成温度が高い方がより耐食、耐熱性があり、鋳造時の
！ＩＩＨｉ強度が高くなる。(Problems to be Solved by the Invention) By the way, coating layers containing oxide-based ceramic materials such as S, C-based, Z, 02-based, and +l 203-based ceramic materials have better corrosion resistance and heat resistance when the firing temperature is higher. Yes, at the time of casting! IIHi intensity increases.
しかしながら、上記方法によると、鋳型表面に塗布され
たスラリーを高温で焼成すると、鋳型が劣化するため、
コーティング層の焼成温度を高くすることができなかっ
た。However, according to the above method, when the slurry applied to the mold surface is fired at high temperature, the mold deteriorates.
It was not possible to increase the firing temperature of the coating layer.
従って、形成されるコーティング層の鋳造時での剥離強
度が低く、連続して数ショット程度しか鋳造作業が行え
ず、顧繁にコーティング作業を行う必要があり、生産効
率が悪いという問題があった。Therefore, the peel strength of the coating layer that is formed during casting is low, and only a few shots can be cast in succession, requiring repeated coating operations, resulting in poor production efficiency. .
本発明はかかる現状に鑑みなされたものであり、鋳造用
鋳型表面に、耐食、耐熱性に優れ鋳造時の剥離強度の高
いコーティング層を容易に形成する方法を提供すること
を目的とする。The present invention was made in view of the current situation, and an object of the present invention is to provide a method for easily forming a coating layer on the surface of a casting mold, which is excellent in corrosion resistance and heat resistance, and has high peel strength during casting.
（問題点を解決するための手段）
上記従来技術の問題点を解決する手段として、加水分解
により酸化物系セラミック材を生成する有機金属化合物
の少なくとも２種を含む混合物、又は該有機金属化合物
の少なくとも１種及び酸化物系セラミック粉末を含む混
合物を有機溶剤中に加え均一に溶解、分散させてコーテ
ィング材とし、該コーティング材をゲル化して鋳型表面
に塗布し乾燥させて該鋳型表面に上記混合物層を形成し
た後、該混合物層内の上記有機金属化合物を水蒸気雰囲
気中にて酸化物系セラミック材とし、更に得られた鋳型
に溶湯を注湯し、該溶湯熱により上記混合物層をコーテ
ィング層とした。(Means for Solving the Problems) As a means for solving the above-mentioned problems of the prior art, a mixture containing at least two types of organometallic compounds that produce an oxide ceramic material by hydrolysis, or a mixture of the organometallic compounds A mixture containing at least one kind and an oxide ceramic powder is added to an organic solvent, uniformly dissolved and dispersed to obtain a coating material, and the coating material is gelled and applied to the surface of a mold, dried, and the above mixture is applied to the surface of the mold. After forming the layer, the organic metal compound in the mixture layer is converted into an oxide ceramic material in a steam atmosphere, and the molten metal is poured into the mold, and the mixture layer is converted into a coating layer by the heat of the molten metal. And so.
本明細書において、上記有機金属化合物とは、Ｚｒ＋ｓ
ｌ＋ Ａｊ２ 、Ｍｇ、Ｃａ等のアルキル金属化合物及
びアリール金属化合物に加えて、フェノキシト、アルコ
キシド等を含む。In this specification, the organometallic compound is Zr+s
In addition to alkyl metal compounds and aryl metal compounds such as l+ Aj2, Mg, and Ca, phenoxides, alkoxides, and the like are included.
（作用）
以上の手段によれば、上記混合物を有機溶剤中に加え均
一に溶解、分散させることによりゾル状またはスラリー
状のコーティング材が得られる。(Function) According to the above means, a sol-like or slurry-like coating material can be obtained by adding the above-mentioned mixture into an organic solvent and uniformly dissolving and dispersing it.
また、該コーティング材をゲル化して鋳型表面に塗布し
乾燥させて得られる上記混合物層には、２種以上の上記
有機金属化合物又は１種以上の上記有機金属化合物と酸
化物系セラミック粉末が均一に含まれている。In addition, the mixture layer obtained by gelling the coating material, applying it to the surface of the mold, and drying it, contains two or more of the above organometallic compounds or one or more of the above organometallic compounds and an oxide ceramic powder uniformly. included in.
以上の混合物層中の有機金属化合物は加水分解され最終
的に水蒸気雰囲気中にて酸化物系セラミック材を生成す
る。以下にエトキシドの加水分解例について記す。The organometallic compound in the above mixture layer is hydrolyzed and finally produces an oxide ceramic material in a steam atmosphere. Examples of hydrolysis of ethoxide are described below.
Ｓ Ｉ（ＯＣ２Ｈ５） ４ ＋ ２１ｈＯ→５１０２＋
４Ｃ２Ｈ５０Ｈ（テトラエトキシシラン）
・・・■Ｚｒ（ＯＣＪｓ）４ ＋ ２Ｈ２０
＝ ｚ、ｏ２＋ ４Ｃ２８５０Ｈ（ジルコニウムプロポ
キシド） ・・・■Ｃｌ１（ＯＣ２Ｈ５
）２ ＋ Ｈ２Ｏ→Ｃ，Ｏ＋２Ｃ２Ｈ，ＯＨ（カリウム
エトキシド） ・・・０Ｍｇ
（ＯＣＪｓ）２ ＋ Ｈ２Ｏ→ＭｇＯ＋２Ｃ２Ｈ６ＯＨ
（マグネシウムエトキシド） ・・・
０次に、上記混合物層を有する鋳型に溶湯を注湯すると
、上記有機物化合物が加水分解することによる２種以上
の酸化物系セラミック材（上記反応式■〜■の右辺の酸
化物）、又は１種以上の該酸化物系セラミック材と酸化
物系セラミック粉末が上記溶湯熱により焼結して複合酸
化物を形成し、緻密で耐食、耐酸性に優れ、剥離強度の
高いコーティング層を得ることができる。SI(OC2H5) 4 + 21hO→5102+
4C2H50H (tetraethoxysilane)
... ■ Zr (OCJs) 4 + 2H20
= z, o2+ 4C2850H (zirconium propoxide)...■Cl1(OC2H5
)2 + H2O→C,O+2C2H,OH (potassium ethoxide)...0Mg
(OCJs)2 + H2O→MgO+2C2H6OH
(Magnesium ethoxide)...
Next, when the molten metal is poured into the mold having the mixture layer, the organic compound is hydrolyzed, resulting in two or more oxide-based ceramic materials (the oxides on the right side of the reaction formulas ■ to ■), or One or more of the oxide-based ceramic materials and oxide-based ceramic powder are sintered by the heat of the molten metal to form a composite oxide, thereby obtaining a coating layer that is dense, has excellent corrosion resistance, acid resistance, and high peel strength. Can be done.
上記コーティング材中に含まれる上記有機金属化合物及
び上記酸化物系セラミック粉末の種類及び含有量比を調
製することにより様々な複合酸化物を得ることができ、
以下にその好ましい例を例示する。Various composite oxides can be obtained by adjusting the types and content ratios of the organometallic compound and the oxide-based ceramic powder contained in the coating material,
Preferred examples are illustrated below.
（ａ）ジルコニウムプロポキシド及びテトラエトキシシ
ランを含むコーティング材
→ＺｒＯ２・５Ｉ０２（ジルコン）
（ｂ）マグネシウムエトキシド、Ａｎ ２０３粉末及び
５Ｉ０２粉末を含むコーティング材
→２Ｍｇ０・２Ａｕ ２０３・５ＳＩＯ２（コージェラ
イト）（ｅ）マグネシウムエトキシド及びテトラエトキ
シシランを含むコーティング材
−ＭｇＯ・５Ｉ０２（ステアタイト）及び２Ｍｇ０・５
１０２（フォルステライト）（ｄ）テトラエトキシシラ
ン及びＡＪ２２０．粉末を含むコーティング材
＝３Ａｊ！ｒｏ３・２５１０２ （ムライト）（ｅ）ジ
ルコニウムプロポキシド及びカリウムエトキシドを含む
コーティング材
→安定化ジルコニア
（尚上記例（ｅ）においてはコーティング材にＹ２Ｏ３
粉末を加えても良い）
以上、数例を例示したが、本発明は上記例（ａ）〜（ｅ
）にその範囲を限定するものではない。(a) Coating material containing zirconium propoxide and tetraethoxysilane → ZrO2.5I02 (zircon) (b) Coating material containing magnesium ethoxide, An 203 powder and 5I02 powder → 2Mg0.2Au 203.5SIO2 (cordierite) ( e) Coating materials containing magnesium ethoxide and tetraethoxysilane - MgO.5I02 (Steatite) and 2Mg0.5
102 (Forsterite) (d) Tetraethoxysilane and AJ220. Coating material including powder = 3 Aj! ro3・25102 (Mullite) (e) Coating material containing zirconium propoxide and potassium ethoxide → Stabilized zirconia (In the above example (e), the coating material contains Y2O3
Although several examples have been illustrated above, the present invention is applicable to the above examples (a) to (e).
) is not intended to limit its scope.
（実施例１）
以下に本発明の実施例を添付図面を参照して具体的に説
明する。(Example 1) Examples of the present invention will be specifically described below with reference to the accompanying drawings.
第１図は本発明方法を実施した高密度炭素材［密度１．
７５ （ｇ／ｃｍ３）以上、 １．８５ （ｇ／ｃｍ３
）以下］からなる鋳型の全体図であり、炭素材鋳型１に
は、溶湯の注湯口２、湯道３及びキャビティ４（鋳物面
）が形成されている。ここで図示例にあってはキャビテ
ィ４はカムシャフトを鋳造するものである。FIG. 1 shows a high-density carbon material [density 1.
75 (g/cm3) or more, 1.85 (g/cm3)
) Below] is an overall view of a mold consisting of a carbon material mold 1, in which a molten metal pouring port 2, a runner 3, and a cavity 4 (casting surface) are formed. In the illustrated example, the cavity 4 is for casting a camshaft.
先ず、上記キャビティ４の表面に以下に説明する操作に
よりコーティング材を塗布した。First, a coating material was applied to the surface of the cavity 4 by the operation described below.
上記コーティング材は、１００ｇのアルミニウムイソプ
ロポキシドと、５０ｇのテトラエトキシシランとを３０
０ｃｍ３のエタノール中に加え、スターンを用いて均一
に分散させゾル状として得られる。The above coating material was made by mixing 100 g of aluminum isopropoxide and 50 g of tetraethoxysilane at 30 g.
It is added to 0 cm3 of ethanol and dispersed uniformly using a stern to obtain a sol.
次に該混合液に触媒として１０ｃｍ３の塩酸を加えてゲ
ル化し、上記鋳型１のキャビティ４表面に塗布し、乾燥
させて該表面に混合物層を形成し、更に該鋳型を温度４
００℃の水蒸気雰囲気中に保持した。Next, 10 cm3 of hydrochloric acid is added as a catalyst to the mixture to gel it, and the mixture is applied to the surface of the cavity 4 of the mold 1, dried to form a mixture layer on the surface, and the mold is heated to a temperature of 4.
It was maintained in a steam atmosphere at 00°C.
しかる後に、該鋳型１を乾燥させ、鋼材（ＳＫＤＩＩ）
の溶湯（温度１６００℃）を上記湯口２より注湯して鋳
込み、１０秒後に離型してキャビティ４表面を観察した
ところ該表面に緻密なコーティング層の形成が認められ
た。After that, the mold 1 is dried and made of steel (SKDII).
The molten metal (temperature: 1600° C.) was poured from the sprue 2 and cast, and the mold was released after 10 seconds and the surface of the cavity 4 was observed, and a dense coating layer was observed to be formed on the surface.
また、上記コーティング層を有する上記鋳型１を用い、
１０回連続して上記鋼材の鋳込みを行なったが、その後
もコーティング層は剥離部分がなく健全であり、溶湯に
よる侵食、酸化による劣化はなかった。該コーティング
層をＸ線解析により分析したところ、主にムライト （
３ＡＪ２２０３・２５１０３）から成ることがわかフた
。Further, using the mold 1 having the coating layer,
The above-mentioned steel material was poured 10 times in succession, and even after that, the coating layer remained sound with no peeled parts, and there was no erosion by molten metal or deterioration due to oxidation. When the coating layer was analyzed by X-ray analysis, it was found that it was mainly composed of mullite (
3AJ2203/25103).
（実施例２）
３００ｇのテトラエトキシシラン及びジルコニウムプロ
ポキシド５００ｇを３００ｃｍ３のエタノール中に加え
、アトライターを用いて均一に分散させてゾル状のコー
ティング材を得た。(Example 2) 300 g of tetraethoxysilane and 500 g of zirconium propoxide were added to 300 cm 3 of ethanol and uniformly dispersed using an attritor to obtain a sol-like coating material.
次に上記コーティング材に触媒として１０ｃｍ３の塩酸
を加えてゲル状とし、実施例１と同様の鋳型１のキャビ
ティ４表面に塗布し乾燥させて該表面に混合物層を形成
し、更に該鋳型１を温度４００℃の水蒸気雰囲気中に保
持した。Next, 10 cm3 of hydrochloric acid was added as a catalyst to the above coating material to make it into a gel, and it was applied to the surface of the cavity 4 of the mold 1 similar to that in Example 1 and dried to form a mixture layer on the surface. It was maintained in a steam atmosphere at a temperature of 400°C.
しかる後に、該鋳型１を乾燥させ、鋼材（ＳＫＤＩＩ）
の溶湯（温度１６００℃）を湯口２より注湯して鋳込み
、１０秒後に離型してキャビティ４表面を観察したとこ
ろ、該表面に緻密なコーティング層の形成が認められた
。After that, the mold 1 is dried and made of steel (SKDII).
The molten metal (temperature: 1600° C.) was poured from the sprue 2 and cast, and the mold was released after 10 seconds and the surface of the cavity 4 was observed, and it was observed that a dense coating layer had been formed on the surface.
また上記鋳型１を用い、２０回連続して上記鋼材の鋳込
みを行ったが、その後もコーティング層は剥離部分がな
く健全であり、溶湯による侵食、酸化による劣化が認め
られなかった。また、鋳造した鋳物表面のチル層は減少
し、充分な断熱効果があった。該コーティング層をＸ線
解析により分析したところ主にジルコン（ｚｒ０２・５
１０２）から成ることがわかった。Further, the above-mentioned steel material was cast 20 times in succession using the above-mentioned mold 1, and even after that, the coating layer remained sound with no peeling parts, and no corrosion by molten metal or deterioration due to oxidation was observed. In addition, the chill layer on the surface of the cast metal was reduced, and a sufficient heat insulation effect was achieved. When the coating layer was analyzed by X-ray analysis, it was mainly found that zircon (zr02/5
102).
以上、実施例において、高密度炭素材から成る鋳型を用
いたが、本発明はその他の公知合金製鋳型、例えば鉄、
アルミニウム又は銅合金製鋳型等においても適用可能で
ある。In the above examples, a mold made of high-density carbon material was used, but the present invention also applies to molds made of other known alloys, such as iron,
It is also applicable to aluminum or copper alloy molds.
（発明の効果）
以上説明したように本発明に°よれば、コーティング材
に含まれる有機金属化合物及び酸化物系セラミック粉末
を選択することにより、様々な組成の複合酸化物から成
るコーティング層を得られるばかりでなく、得られたコ
ーティング層は充分な断熱性を有し、更に溶湯熱により
高温にて焼成されたものであるため、耐食、耐酸化性に
優れ、剥離強度が高いものである。(Effects of the Invention) As explained above, according to the present invention, by selecting the organometallic compound and the oxide-based ceramic powder contained in the coating material, a coating layer made of composite oxides of various compositions can be obtained. In addition, the obtained coating layer has sufficient heat insulation properties, and since it is fired at a high temperature using the heat of the molten metal, it has excellent corrosion resistance, oxidation resistance, and high peel strength.
以上のように本発明によれば、コーティング層の耐久性
が向上するため、連続して鋳造を行なえるため生産性を
向上でき、更に第１回の鋳造によりコーティング層を形
成できるため、特別にコーティング層焼成工程を必要と
せず、鋳型製造作業の省力化を図ることができる。As described above, according to the present invention, the durability of the coating layer is improved, so casting can be performed continuously, improving productivity, and furthermore, since the coating layer can be formed in the first casting, special There is no need for a coating layer firing step, and labor savings in mold manufacturing work can be achieved.
添付図面は、本発明を実施した高密度炭素材から成る鋳
型の全体図である。
尚図中、１は鋳型、２は湯口、３は湯道、４はキャビテ
ィである。The accompanying drawing is an overall view of a mold made of high-density carbon material in which the present invention is implemented. In the figure, 1 is a mold, 2 is a sprue, 3 is a runner, and 4 is a cavity.
Claims (1)
属化合物の少なくとも２種を含む混合物、又は該有機金
属化合物の少なくとも１種及び酸化物系セラミック粉末
を含む混合物を有機溶剤中に加え均一に溶解、分散させ
てコーティング材とし、該コーティング材をゲル化して
鋳型表面に塗布し乾燥させて該鋳型表面に上記混合物層
を形成した後、該混合物層内の上記有機金属化合物を水
蒸気雰囲気中にて酸化物系セラミック材とし、更に得ら
れた鋳型に溶湯を注湯し、該溶湯熱により上記混合物層
をコーティング層とすることを特徴とする鋳型コーティ
ング層形成方法。A mixture containing at least two organometallic compounds that produce an oxide ceramic material by hydrolysis, or a mixture containing at least one of the organometallic compounds and an oxide ceramic powder is added to an organic solvent and uniformly dissolved; The coating material is dispersed to form a coating material, and the coating material is gelled and applied to the mold surface and dried to form the mixture layer on the mold surface.The organic metal compound in the mixture layer is then oxidized in a steam atmosphere. 1. A method for forming a coating layer in a mold, characterized in that the mixture layer is formed into a coating layer by pouring a molten metal into the obtained mold, and using the heat of the molten metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8016987A JPS63248542A (en) | 1987-04-01 | 1987-04-01 | Method for forming coating layer in mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8016987A JPS63248542A (en) | 1987-04-01 | 1987-04-01 | Method for forming coating layer in mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63248542A true JPS63248542A (en) | 1988-10-14 |
| JPH044054B2 JPH044054B2 (en) | 1992-01-27 |
Family
ID=13710823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8016987A Granted JPS63248542A (en) | 1987-04-01 | 1987-04-01 | Method for forming coating layer in mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63248542A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014192820A1 (en) * | 2013-05-29 | 2014-12-04 | 三菱重工業株式会社 | Core for precision casting, production method therefor, and mold for precision casting |
-
1987
- 1987-04-01 JP JP8016987A patent/JPS63248542A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014192820A1 (en) * | 2013-05-29 | 2014-12-04 | 三菱重工業株式会社 | Core for precision casting, production method therefor, and mold for precision casting |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH044054B2 (en) | 1992-01-27 |
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