CN114558981A

CN114558981A - Novel anti-sulfurization casting coating

Info

Publication number: CN114558981A
Application number: CN202011360315.9A
Authority: CN
Inventors: 陈敏; 李廷珍
Original assignee: Ha Foundry Materials China Co ltd
Current assignee: Ha Foundry Materials China Co ltd
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2022-05-31
Anticipated expiration: 2040-11-27
Also published as: CN114558981B

Abstract

The invention discloses a novel anti-sulfur-seepage casting coating, which relates to the field of coatings and comprises 400 parts of high-activity calcium-containing magnesium-containing material 200-containing material, 500 parts of precipitated calcium carbonate 200-containing material, 300 parts of calcined kaolin 100-containing material, 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 prevention coating adopts a high-activity calcium-containing 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 the superfine active powder, increases the infiltration reaction of the coating to the sand mold, increases the contact area of the coating and the sand mold, and increases the sintering reaction effect; the product of the reaction with the casting forms a sintering layer on the surfaces of the casting and the sand mold, so that the sulfur element in the sand mold is further prevented from permeating into molten metal, the variation of molten metal tissues is reduced, and the influence of the sulfur in the curing agent in the furan resin sand on the casting material is solved.

Description

Novel anti-sulfurization casting coating

Technical Field

The invention relates to the field of coatings, in particular to a novel anti-sulfurization casting coating.

Background

The casting coating is a casting auxiliary material which is covered on the surface of a core in the casting process so as to improve the properties of surface fire resistance, chemical stability, molten metal scouring resistance, sand adhesion resistance and the like; the ZD coating is used for insulating heat and balancing temperature, and avoids the impact and the corrosivity of molten metal, thereby achieving the purposes of protecting a mould and prolonging the service life of the mould by more than 1/3; the casting coating can effectively prevent the casting product from cracking and white iron from forming due to too fast local cooling; the adsorption time of the casting coating is as long as 7 days, the air permeability is good, the acetylene smoke treatment can be used for replacing the use of the release agent in each demoulding process, and one casting can be poured and smoked once.

Furan resin sand is brownish red and amber viscous liquid, is slightly soluble in water, is easily soluble in organic solvents such as ester and ketone, and is an ideal sand (mould) core binder in the casting industry.

Sulfur is a harmful element in general, and causes hot shortness of steel, reduces ductility and toughness of steel, causes cracks in forging and rolling, is also unfavorable for welding performance, and reduces corrosion resistance, so that a sulfur content of less than 0.055% is generally required, and a high-quality steel of less than 0.040% is required. Machinability is improved by adding 0.08-0.20% sulphur to the steel, commonly known as free-cutting steel.

The casting coating comprises a refractory filler, a solvent, a binder, a suspending agent and a surface additive, sand grains generate binding power through the reaction of furan resin and a sulfonic acid curing agent in the production process of casting furan resin, sulfur in the furan resin sand permeates into molten metal in a gas form in the high-temperature pouring process to increase the sulfur content of the furan resin sand, and various low-melting-point sulfides of iron are generated to cause the abnormal internal organization structure and the formation of cracks in the molten metal in the cooling process.

Disclosure of Invention

The invention aims to: in order to solve the problem of influence of sulfur in a curing agent on casting materials, a novel anti-sulfurization casting coating is provided.

In order to achieve the purpose, the invention provides the following technical scheme: a novel anti-seepage casting coating comprises 400 parts of high-activity calcium-containing magnesium-containing material 200-containing material, 500 parts of precipitated calcium carbonate 200-containing material, 300 parts of calcined kaolin 100-containing material, 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, 30-60 parts of fatty alcohol-polyoxyethylene ether, 50-60 parts of refractory filler, 20-50 parts of solvent and 15-45 parts of defoaming agent.

Preferably, the solvent is ethanol.

Preferably, the defoaming agent is polyether modified silicone oil.

Preferably, the production steps comprise sequentially putting the high-activity calcium-containing magnesium-containing material, the precipitated calcium carbonate, the calcined kaolin, the furan resin sand, the zircon powder, the titanium dioxide, the vegetable gum, the suspending agent, the surface additive, the fatty alcohol-polyoxyethylene ether, the refractory filler, the solvent and the defoaming agent into a high-speed dispersion machine, and uniformly dispersing the raw materials by the high-speed dispersion machine.

Compared with the prior art, the invention has the beneficial effects that:

1. the sulfur seepage prevention coating adopts a high-activity calcium-containing 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 the superfine active powder, increases the infiltration reaction of the coating to the sand mold, increases the contact area of the coating and the sand mold, and increases the sintering reaction effect;

3. the product of the reaction with the casting forms a sintering layer on the surfaces of the casting and the sand mold, so that the sulfur element in the sand mold is further prevented from permeating into molten metal, the variation of molten metal tissues is reduced, and the influence of the sulfur in the curing agent in the furan resin sand on the casting material is solved.

Detailed Description

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present 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 otherwise explicitly specified or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. The following describes an embodiment of the present invention based on its overall structure.

A novel anti-seepage casting coating comprises 400 parts of high-activity calcium-containing magnesium-containing material 200-containing material, 500 parts of precipitated calcium carbonate 200-containing material, 300 parts of calcined kaolin 100-containing material, 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, 30-60 parts of fatty alcohol-polyoxyethylene ether, 50-60 parts of refractory filler, 20-50 parts of solvent and 15-45 parts of defoaming agent.

The solvent is ethanol.

The defoaming agent is polyether modified silicone oil.

The production steps are that high-activity calcium-containing magnesium-containing material, precipitated calcium carbonate, calcined kaolin, furan resin sand, zircon powder, titanium dioxide, vegetable gum, suspending agent, surface additive, fatty alcohol-polyoxyethylene ether, refractory filler, solvent and defoaming agent are sequentially put into a high-speed dispersion machine, and the raw materials are uniformly dispersed by the high-speed dispersion machine.

Example one

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 defoaming agent.

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 defoaming agent.

EXAMPLE III

300 parts of high-activity calcium-containing magnesium-containing material, 450 parts of deposited 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 defoaming agent.

The experimental analysis and practice of experimenters result in the best three effects of the embodiment.

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 attributes 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

1. A novel anti-seepage casting coating comprises 400 parts of high-activity calcium-containing magnesium-containing material 200-containing material, 500 parts of precipitated calcium carbonate 200-containing material, 300 parts of calcined kaolin 100-containing material, 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, 30-60 parts of fatty alcohol-polyoxyethylene ether, 50-60 parts of refractory filler, 20-50 parts of solvent and 15-45 parts of defoaming agent.

2. The novel impervious sulfur casting coating as claimed in claim 1, wherein: the solvent is ethanol.

3. The novel anti-sulfurization casting paint according to claim 1, characterized in that: the defoaming agent is polyether modified silicone oil.

4. The novel anti-sulfurization casting paint according to claim 1, characterized in that: the production steps are that high-activity calcium-containing magnesium-containing material, precipitated calcium carbonate, calcined kaolin, furan resin sand, zircon powder, titanium dioxide, vegetable gum, suspending agent, surface additive, fatty alcohol-polyoxyethylene ether, refractory filler, solvent and defoaming agent are sequentially put into a high-speed dispersion machine, and the raw materials are uniformly dispersed by the high-speed dispersion machine.