CN114558981B - Sulfur-seepage-proof casting coating - Google Patents
Sulfur-seepage-proof casting coating Download PDFInfo
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- CN114558981B CN114558981B CN202011360315.9A CN202011360315A CN114558981B CN 114558981 B CN114558981 B CN 114558981B CN 202011360315 A CN202011360315 A CN 202011360315A CN 114558981 B CN114558981 B CN 114558981B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
Abstract
The invention discloses a sulfur-seepage-proofing casting coating, which relates to the field of coatings and comprises 200-400 parts of high-activity calcium-containing magnesium-containing material, 200-500 parts of precipitated calcium carbonate, 100-300 parts of calcined kaolin, 65-95 parts of furan resin sand, 55-85 parts of zircon powder, 15-45 parts of titanium dioxide, 5-9 parts of vegetable gum, 8-15 parts of suspending agent, 4-12 parts of surface additive and 30-60 parts of fatty alcohol polyoxyethylene ether. The sulfur-seepage-proofing coating adopts a high-activity calcium-magnesium-containing material, and the infiltration of sulfur into molten metal is reduced by the reaction of calcium and magnesium elements and sulfur at high temperature; the invention uses superfine active powder, increases the infiltration reaction of the coating to the sand mold, increases the contact area between the coating and the sand mold, and increases the sintering reaction effect; the product of the reaction between the invention and the casting forms a sintering layer on the surfaces of the casting and the sand mold, further prevents sulfur element in the sand mold from penetrating into the molten metal, reduces the variation of the molten metal structure, and solves the problem that sulfur in the curing agent in furan resin sand affects the material of the casting.
Description
Technical Field
The invention relates to the field of coatings, in particular to an anti-sulfur casting coating.
Background
The casting coating is a casting auxiliary material which is covered on the surface of the core in the casting process to improve the performances of fire resistance, chemical stability, molten metal scouring resistance, sand resistance and the like of the surface; the casting coating can be made into paste, paste or powder, and is coated on the surface of the mold core by spraying, brushing, immersing, flowing and the like, the ZD coating insulates heat and balances the temperature, so that the impact and corrosiveness of molten metal are avoided, the mold is protected, and the service life of the mold is prolonged by more than 1/3; the casting coating effectively prevents the cracking and white iron formation of cast products caused by too fast local cooling; the adsorption time of the casting coating is as long as 7 days, the air permeability is good, acetylene fumigation treatment can be used for replacing the use of a release agent for each demolding, and one casting is poured for one time to be smoked.
The sand is a brown-red, amber viscous liquid, slightly soluble in water and easily soluble in organic solvents such as esters and ketones, and is an ideal sand (mould) core binder for the foundry industry, and is characterized by the advantages of good sand (mould) core precision, high strength, small odor, moisture absorption resistance, good collapsibility, recycling of sand and the like, and the like.
Sulfur is also a harmful element in general, and causes hot shortness of steel, decreases ductility and toughness of steel, causes cracks during forging and rolling, is also disadvantageous in welding properties, and decreases corrosion resistance, so that sulfur content of less than 0.055% is generally required and quality steel of less than 0.040% is required. The addition of 0.08 to 0.20% sulfur to steel improves machinability, commonly known as free-cutting steel.
The casting coating comprises refractory filler, solvent, binder, suspending agent and surface additive, generally, sand grains react with sulfonic acid curing agent to generate binding force through furan resin in the production process, sulfur element in furan resin sand permeates into molten metal in a gas form in the high-temperature casting process, so that the sulfur content of the molten metal is increased, low-melting-point sulfides of various irons are generated, abnormal internal tissue structures and cracks are formed in the molten metal in the cooling process, and no effective means for thoroughly solving the problem at present is available in China.
Disclosure of Invention
The invention aims at: in order to solve the problem of influence of sulfur in a curing agent on casting materials, the sulfur-seepage-proofing casting coating is provided.
In order to achieve the above purpose, the present invention provides the following technical solutions: the sulfur seepage preventing casting paint includes high activity calcium and magnesium containing material 200-400 weight portions, deposited calcium carbonate 200-500 weight portions, calcined kaolin 100-300 weight portions, furan resin sand 65-95 weight portions, zircon powder 55-85 weight portions, titanium white 15-45 weight portions, vegetable gum 5-9 weight portions, suspending agent 8-15 weight portions, surface additive 4-12 weight portions, fatty alcohol polyoxyethylene ether 30-60 weight portions, fireproof stuffing 50-60 weight portions, solvent 20-50 weight portions, and defoaming agent 15-45 weight portions.
Preferably, the solvent is ethanol.
Preferably, the defoamer is polyether modified silicone oil.
Preferably, the production steps are that the high-activity calcium-magnesium-containing material, the deposited calcium carbonate, the calcined kaolin, the furan resin sand, the zircon powder, the titanium pigment, the vegetable gum, the suspending agent, the surface additive, the fatty alcohol-polyoxyethylene ether, the refractory filler, the solvent and the defoamer are sequentially placed into a high-speed dispersing machine, and the raw materials are uniformly dispersed through the high-speed dispersing machine.
Compared with the prior art, the invention has the beneficial effects that:
1. the sulfur-seepage-proofing coating adopts a high-activity calcium-magnesium-containing material, and the infiltration of sulfur into molten metal is reduced by the reaction of calcium and magnesium elements and sulfur at high temperature;
2. the invention uses superfine active powder, increases the infiltration reaction of the coating to the sand mold, increases the contact area between the coating and the sand mold, and increases the sintering reaction effect;
3. the product of the reaction between the invention and the casting forms a sintering layer on the surfaces of the casting and the sand mold, further prevents sulfur element in the sand mold from penetrating into the molten metal, reduces the variation of the molten metal structure, and solves the problem that sulfur in the curing agent in furan resin sand affects the material of the casting.
Detailed Description
All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "configured" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. Hereinafter, an embodiment of the present invention will be described in accordance with its entire structure.
The sulfur seepage preventing casting paint includes high activity calcium and magnesium containing material 200-400 weight portions, deposited calcium carbonate 200-500 weight portions, calcined kaolin 100-300 weight portions, furan resin sand 65-95 weight portions, zircon powder 55-85 weight portions, titanium white 15-45 weight portions, vegetable gum 5-9 weight portions, suspending agent 8-15 weight portions, surface additive 4-12 weight portions, fatty alcohol polyoxyethylene ether 30-60 weight portions, fireproof stuffing 50-60 weight portions, solvent 20-50 weight portions, and defoaming agent 15-45 weight portions.
The solvent adopts ethanol.
The defoamer is polyether modified silicone oil.
The production process includes the steps of sequentially placing high-activity calcium-containing magnesium-containing material, deposited calcium carbonate, calcined kaolin, furan resin sand, zircon powder, titanium pigment, vegetable gum, suspending agent, surface additive, fatty alcohol polyoxyethylene ether, refractory filler, solvent and defoaming agent into a high-speed dispersing machine, and uniformly dispersing the raw materials through the high-speed dispersing machine.
Example 1
200 parts of high-activity calcium-containing magnesium-containing material, 200 parts of precipitated calcium carbonate, 100 parts of calcined kaolin, 65 parts of furan resin sand, 55 parts of zircon powder, 15 parts of titanium dioxide, 5 parts of vegetable gum, 8 parts of suspending agent, 4 parts of surface additive, 30 parts of fatty alcohol polyoxyethylene ether, 50 parts of refractory filler, 20 parts of solvent and 15 parts of defoamer.
Example two
400 parts of high-activity calcium-containing magnesium-containing material, 500 parts of precipitated calcium carbonate, 300 parts of calcined kaolin, 95 parts of furan resin sand, 85 parts of zircon powder, 45 parts of titanium dioxide, 9 parts of vegetable gum, 15 parts of suspending agent, 12 parts of surface additive, 60 parts of fatty alcohol polyoxyethylene ether, 60 parts of refractory filler, 50 parts of solvent and 45 parts of defoamer.
Example III
300 parts of high-activity calcium-containing magnesium-containing material, 450 parts of precipitated calcium carbonate, 150 parts of calcined kaolin, 85 parts of furan resin sand, 75 parts of zircon powder, 35 parts of titanium dioxide, 9 parts of vegetable gum, 12 parts of suspending agent, 8 parts of surface additive, 55 parts of fatty alcohol polyoxyethylene ether, 55 parts of refractory filler, 45 parts of solvent and 35 parts of defoamer.
The best effect of the third embodiment is obtained by experimental personnel through experimental analysis and practice.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (4)
1. The sulfur seepage preventing casting paint includes high activity calcium and magnesium containing material 200-400 weight portions, deposited calcium carbonate 200-500 weight portions, calcined kaolin 100-300 weight portions, furan resin sand 65-95 weight portions, zircon powder 55-85 weight portions, titanium white 15-45 weight portions, vegetable gum 5-9 weight portions, suspending agent 8-15 weight portions, surface additive 4-12 weight portions, fatty alcohol polyoxyethylene ether 30-60 weight portions, fireproof stuffing 50-60 weight portions, solvent 20-50 weight portions, and defoaming agent 15-45 weight portions.
2. The sulfur-barrier foundry coating of claim 1 wherein: the solvent adopts ethanol.
3. The sulfur-barrier foundry coating of claim 1 wherein: the defoamer is polyether modified silicone oil.
4. The sulfur-barrier foundry coating of claim 1 wherein: the production process includes the steps of adding high activity calcium-containing magnesium-containing material, deposited calcium carbonate, calcined kaolin, furan resin sand, zircon powder, titanium pigment, vegetable gum, suspending agent, surface additive, fatty alcohol polyoxyethylene ether, fireproof stuffing, solvent and defoaming agent into a high-speed dispersing machine in sequence, and dispersing the raw materials uniformly by the high-speed dispersing machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011360315.9A CN114558981B (en) | 2020-11-27 | 2020-11-27 | Sulfur-seepage-proof casting coating |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011360315.9A CN114558981B (en) | 2020-11-27 | 2020-11-27 | Sulfur-seepage-proof casting coating |
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| CN114558981A CN114558981A (en) | 2022-05-31 |
| CN114558981B true CN114558981B (en) | 2023-09-01 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5844945A (en) * | 1981-09-11 | 1983-03-16 | Nippon Stainless Steel Co Ltd | Mold coating material for prevention of carburization and sulfurization used for organic self-hardening mold |
| JPH07132344A (en) * | 1993-11-09 | 1995-05-23 | Daihatsu Kinzoku Kogyo Kk | Method for preventing sulfurization of organic self-curing casting mold and its mold coat |
| CN101817058A (en) * | 2010-03-30 | 2010-09-01 | 深圳市景鼎现代科技有限公司 | Shield type coating composition and preparation process of coating thereof |
| CN102328018A (en) * | 2011-10-28 | 2012-01-25 | 上海市机械制造工艺研究所有限公司 | Casting surface sulfur-seepage-prevention coating for furan resin sand mould |
| CN106180542A (en) * | 2016-08-17 | 2016-12-07 | 高红星 | Furan Resin-Bonded Sand wind-powered electricity generation G. Iron Castings surface anti-seepage sulfur coating |
| CN106734874A (en) * | 2016-12-13 | 2017-05-31 | 安徽龙氏机械制造有限公司 | A kind of resin bonded sand mould casts antisurlphuizing coating |
| CN106734873A (en) * | 2016-11-10 | 2017-05-31 | 安徽龙氏机械制造有限公司 | A kind of antisurlphuizing coating |
| CN109575746A (en) * | 2018-10-31 | 2019-04-05 | 安徽开林新材料股份有限公司 | A kind of marine water coating that surface is smooth |
-
2020
- 2020-11-27 CN CN202011360315.9A patent/CN114558981B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5844945A (en) * | 1981-09-11 | 1983-03-16 | Nippon Stainless Steel Co Ltd | Mold coating material for prevention of carburization and sulfurization used for organic self-hardening mold |
| JPH07132344A (en) * | 1993-11-09 | 1995-05-23 | Daihatsu Kinzoku Kogyo Kk | Method for preventing sulfurization of organic self-curing casting mold and its mold coat |
| CN101817058A (en) * | 2010-03-30 | 2010-09-01 | 深圳市景鼎现代科技有限公司 | Shield type coating composition and preparation process of coating thereof |
| CN102328018A (en) * | 2011-10-28 | 2012-01-25 | 上海市机械制造工艺研究所有限公司 | Casting surface sulfur-seepage-prevention coating for furan resin sand mould |
| CN106180542A (en) * | 2016-08-17 | 2016-12-07 | 高红星 | Furan Resin-Bonded Sand wind-powered electricity generation G. Iron Castings surface anti-seepage sulfur coating |
| CN106734873A (en) * | 2016-11-10 | 2017-05-31 | 安徽龙氏机械制造有限公司 | A kind of antisurlphuizing coating |
| CN106734874A (en) * | 2016-12-13 | 2017-05-31 | 安徽龙氏机械制造有限公司 | A kind of resin bonded sand mould casts antisurlphuizing coating |
| CN109575746A (en) * | 2018-10-31 | 2019-04-05 | 安徽开林新材料股份有限公司 | A kind of marine water coating that surface is smooth |
Non-Patent Citations (1)
| Title |
|---|
| 防渗硫涂料在呋喃树脂自硬砂铸钢件生产中的应用研究;李世平, 吕德志, 李玲, 郑宏伟, 宋会宗, 周静一, 黄彦斌, 李朝社;铸造(第07期);31-34 * |
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| CN114558981A (en) | 2022-05-31 |
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