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Coating for improving spheroidal graphite casting mechanical performance

A technology of mechanics and performance, applied in casting molding equipment, coatings, molds, etc., can solve the problems of high price, lingering performance of casting coatings, low operability, etc., to improve casting mechanical properties, improve mechanical properties, pearlescent The effect of increasing body mass

Inactive Publication Date: 2018-03-09
霍山县东胜铸造材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although a series of researches have been done on the coatings for ductile graphite casting, they have not been really applied to actual production. Its operability is not high and the price is expensive, so it has not attracted enough attention from some manufacturers. The performance of casting coatings is still stay at a basic level

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  • Coating for improving spheroidal graphite casting mechanical performance
  • Coating for improving spheroidal graphite casting mechanical performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A coating for improving the mechanical properties of ductile graphite casting, which is made of the following components in parts by weight: 65 parts of refractory powder, 1.5 parts of mixed suspending agent, 1.0 part of phenolic resin, 0.5 part of ethyl silicate, 15 parts of ethanol, carboxymethyl 0.4 parts of sodium cellulose, 0.3 parts of ethyl cellulose;

[0015] The preparation method is: add the mixed suspending agent into the reactor, heat to 50°C, stir for 20 minutes, add refractory powder and ethanol solution, slowly raise the temperature to 75°C, add phenolic resin, ethyl silicate, carboxymethyl Sodium cellulose and ethyl cellulose are dissolved and homogenized, added to the reactor, kept for 500 minutes, cooled to 40°C, ground and homogenized, stirred evenly, discharged when the temperature reaches 30°C, and packaged.

[0016] As a further improvement to the above scheme, the refractory powder contains the following components in terms of mass percentage: sil...

Embodiment 2

[0020] A coating for improving the mechanical properties of ductile graphite casting, which is made of the following components in parts by weight: 68 parts of refractory powder, 1.8 parts of mixed suspending agent, 1.1 parts of phenolic resin, 0.6 parts of ethyl silicate, 18 parts of ethanol, carboxymethyl 0.5 parts of sodium cellulose, 0.4 parts of ethyl cellulose;

[0021] Its preparation method is: add the mixed suspending agent into the reactor, heat to 55°C, stir for 25 minutes, add refractory powder and ethanol solution, slowly raise the temperature to 76°C, add phenolic resin, ethyl silicate, carboxymethyl Sodium cellulose and ethyl cellulose were dissolved and homogenized, added to the reactor, kept for 55 minutes, cooled to 45°C, ground and homogenized, stirred evenly, discharged when the temperature reached 32°C, and packaged.

[0022] As a further improvement to the above scheme, the refractory powder contains the following components in terms of mass percentage: s...

Embodiment 3

[0026] A coating for improving the mechanical properties of ductile graphite casting, which is made of the following components in parts by weight: 70 parts of refractory powder, 2.0 parts of mixed suspending agent, 1.2 parts of phenolic resin, 0.7 parts of ethyl silicate, 20 parts of ethanol, carboxymethyl 0.6 parts of sodium cellulose, 0.5 parts of ethyl cellulose;

[0027] The preparation method is as follows: add the mixed suspending agent into the reactor, heat to 60°C, stir for 30 minutes, add refractory powder and ethanol solution, slowly raise the temperature to 78°C, add phenolic resin, ethyl silicate, carboxymethyl Sodium cellulose and ethyl cellulose are dissolved and homogenized, added to the reactor, kept for 60 minutes, cooled to 50°C, ground and homogenized, stirred evenly, discharged when the temperature reaches 35°C, and packaged.

[0028] As a further improvement to the above scheme, the refractory powder contains the following components in terms of mass per...

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Abstract

The invention relates to the technical field of spheroidal graphite casing and discloses a coating for improving spheroidal graphite casting mechanical performance. A compound generated by chemical reaction during high-temperature metal liquid pouring does not react with the surface of the coating, the compound has certain mechanical strength to be firmly adhered on a spheroidal graphite cast section material and forms a continuous and uniform coating, and used fireproof powder has extremely high fireproofness and can remarkably increase content of pearlite on the surface of a metal casting without causing casting defects like shrinkage cavities, shrinkage porosity, degraded spheroidization, graphite floating and graphite deformation. Components of the coating are mixed quite well, so thataggregate can be well dissolved and uniformly dispersed in a medium, high-temperature crack resistance of the coating reaches Grade I, casting defect rate of the casting is lowered to 0.01%, and casting mechanical performance, especially tensile strength and elongation rate, is greatly improved when compared with existing production processes.

Description

technical field [0001] The invention belongs to the technical field of ball milling casting, and in particular relates to a coating for improving the mechanical properties of ball casting. Background technique [0002] Foundry coating is used to block and isolate the casting and the mold to achieve the purpose of anti-sticking sand. It is the basic coating for gravity metal casting and is suitable for all metal molds. The casting coating particles are relatively coarse, but it has good thermal insulation performance, which can prevent the casting from lack of meat and cold shut during casting. Suitable for thin section castings and large flat castings, also suitable for feed ports, hubs, pistons, connecting rods, cylinders, etc. In general, there are several methods of coating and hanging casting coatings, including brushing, dipping, showering, spraying or a combination of dipping. Among them, the dipping method has the advantages of high production efficiency, saving pain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00
CPCB22C3/00
Inventor 卢世东
Owner 霍山县东胜铸造材料有限公司
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