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Coating for metal mold casting of magnesium alloy thin-wall parts

A metal mold casting, magnesium alloy technology, applied in casting molding equipment, metal processing equipment, coating, etc., can solve the problems that cannot be applied to magnesium alloys, etc., and achieve the effects of reducing the number of defects, improving quality, and high fire resistance

Active Publication Date: 2015-02-25
南京锐迈涂料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] It can be seen that the coatings used for metal molds of thin-walled parts in the prior art are all aimed at cast aluminum alloys, but there are few reports on magnesium alloys. Due to the difference in properties between magnesium alloys and aluminum alloys, it is impossible to use the coatings in the prior art. Metal mold casting coatings for thin-walled aluminum alloys are directly applied to magnesium alloys. Therefore, it is urgent to develop a metal mold casting coating suitable for magnesium alloy thin-walled parts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A coating for metal mold casting of magnesium alloy thin-walled parts, the coating is composed of the following components in terms of weight percentage: 1.5% diatomite, 3% magnesium oxide powder, 1.2% titanium dioxide powder, 2% zircon powder, bentonite 1.5%, asbestos powder 4%, silica sol 1.2%, and the balance is alcohol.

Embodiment 2

[0018] A coating for metal mold casting of magnesium alloy thin-walled parts, the coating is composed of the following components in weight percentage: 2.5% diatomite, 2% magnesium oxide powder, 1.8% titanium dioxide powder, 1% zircon powder, bentonite 2.5%, asbestos powder 2%, silica sol 1.4%, and the balance is alcohol.

Embodiment 3

[0020] A coating for metal mold casting of magnesium alloy thin-walled parts, the coating is composed of the following components in terms of weight percentage: 1.8% diatomite, 2.7% magnesium oxide powder, 1.4% titanium dioxide powder, 1.7% zircon powder, bentonite 1.8%, asbestos powder 3.5%, silica sol 1.25%, and the balance is alcohol.

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PUM

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Abstract

The invention discloses a coating for a metal mold casting of magnesium alloy thin-wall parts, wherein the coating consists of following components, by weight percent, 1.5 to 2.5% of diatomaceous earth, 2 to 3% of magnesia powder, 1.2 to 1.8% of titanium dioxide powder, 1 to 2% of zircon powder, 1.5 to 2.5% of bentonite, 2 to 4% of asbestos powder, 1.2 to 1.4% of silica sol and the balance of alcohol.

Description

technical field [0001] The invention relates to the field of casting, in particular to a coating for metal mold casting of magnesium alloy thin-walled parts. Background technique [0002] Metal mold casting, also known as hard mold casting, is a casting method in which liquid metal is poured into metal molds to obtain castings. Cast molds are made of metal and can be used repeatedly (hundreds to thousands of times). The castings that metal mold casting can produce at present have certain restrictions in terms of weight and shape. For example, the weight of castings should not be too large; the wall thickness is also limited, and it is difficult to cast smaller castings with wall thickness. [0003] Due to the fast cooling rate of magnesium alloy thin-walled parts in the metal mold casting process, it is easy to form defects such as cold shut, pinholes and shrinkage porosity in the castings, so that the castings are scrapped. Therefore, how to improve the quality of magnesiu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C3/00B22D21/04
Inventor 齐伟光李发旺
Owner 南京锐迈涂料科技有限公司
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