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Coating for metal low pressure casting of magnesium alloy

A low-pressure casting and metal mold technology, which is used in the field of magnesium alloy low-pressure casting and casting, can solve problems such as unsatisfactory performance, and achieve the effects of smooth casting surface, wide source and easy use.

Inactive Publication Date: 2013-06-05
上海力太化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Practice has proved that this technology pays too much attention to its coating not reacting with magnesium, resulting in unsatisfactory other properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A coating for magnesium alloy low-pressure casting metal molds, the coating consists of the following components in parts by weight: 35 parts of magnesium oxide powder, 10 parts of aluminum oxide powder, 3 parts of titanium oxide powder, 5 parts of sodium bentonite, 2.0 parts of poly Vinyl alcohol, 5 parts of sodium hexametaphosphate, 0.8 parts of sodium alginate, 4.0 parts of silica sol, 0.8 parts of sodium dodecylbenzenesulfonate, and the balance is water, wherein magnesium oxide powder, aluminum oxide powder, titanium oxide powder, The particle size of sodium bentonite can be 200-320 mesh.

Embodiment 2

[0022] A coating for magnesium alloy low-pressure casting metal molds, the coating consists of the following components in parts by weight: 45 parts of magnesium oxide powder, 5 parts of aluminum oxide powder, 5 parts of titanium oxide powder, 4 parts of sodium bentonite, 2.5 parts of polystyrene Vinyl alcohol, 3 parts of sodium hexametaphosphate, 1.0 part of sodium alginate, 3.5 parts of silica sol, 1.0 part of sodium dodecylbenzenesulfonate, and the balance is water, wherein magnesium oxide powder, aluminum oxide powder, titanium oxide powder, The particle size of sodium bentonite can be 200-320 mesh.

Embodiment 3

[0024] A coating for magnesium alloy low-pressure casting metal molds, the coating consists of the following components in parts by weight: 40 parts of magnesium oxide powder, 8 parts of aluminum oxide powder, 4 parts of titanium oxide powder, 4.5 parts of sodium bentonite, 2.2 parts of polystyrene Vinyl alcohol, 4 parts of sodium hexametaphosphate, 0.9 parts of sodium alginate, 3.8 parts of silica sol, 0.9 parts of sodium dodecylbenzenesulfonate, and the balance is water, wherein magnesium oxide powder, aluminum oxide powder, titanium oxide powder, The particle size of sodium bentonite can be 200-320 mesh.

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PUM

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Abstract

The invention discloses a coating for metal low pressure casting of magnesium alloy. The coating consists of the following components in part by weight: 3.5 to 45 parts of magnesium oxide powder, 5 to 10 parts of aluminum oxide powder, 3 to 5 parts of titanium oxide powder, 4 to 5 parts of sodium bentonite, 2.0 to 2.5 parts of polyving alcohol, 3 to 5 parts of sodium hexametaphosphate, 0.8 to 1.0parts of sodium alga acid, 3.5 to 4.0 parts of silica sol, 0.8 to 1.0 part of sodium dodecyl benzene sulfonate and the balance of water, wherein the granularity of the magnesium oxide powder, the aluminum oxide powder, the titanium oxide powder, and the sodium bentonite can be 200 to 32 meshes.

Description

technical field [0001] The invention relates to the field of casting, in particular to the technical field of magnesium alloy low-pressure casting. Background technique [0002] Magnesium alloys have the advantages of high specific strength and specific stiffness, good damping, machinability, thermal conductivity, strong electromagnetic shielding ability, and easy recycling. They have broad application prospects in the fields of transportation, communications, electronics, and aerospace. [0003] The chemical properties of magnesium are very active. During the high temperature process, it is easy to react with oxygen and water vapor in the atmosphere, and even the water in the mold. The heat released by the reaction will cause the local temperature of the mold to be too high, resulting in the occurrence of paint and magnesium liquid. The reaction falls off, or the adhesive fails to fall off at high temperature, so that the product has defects such as shrinkage cavities, pore...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C3/00B22D18/04
Inventor 戴初发
Owner 上海力太化学有限公司