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Heat treatment technology for enhancing foam magnesium alloy

A technology for foaming magnesium alloys and enhancing foams, which is applied in the field of alloy manufacturing, can solve the problems of poor corrosion resistance of foamed magnesium alloys, and achieve the effects of overcoming poor corrosion resistance, simple and fast process, and expanding the scope of application

Inactive Publication Date: 2015-05-20
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a heat treatment process for enhancing the foamed magnesium alloy, which is a heat treatment process that improves the corrosion resistance of the foamed magnesium alloy while ensuring the mechanical properties of the foamed magnesium alloy, and overcomes the existing technology in the as-cast state. Disadvantages of poor corrosion resistance of foamed magnesium alloys under conditions

Method used

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  • Heat treatment technology for enhancing foam magnesium alloy
  • Heat treatment technology for enhancing foam magnesium alloy
  • Heat treatment technology for enhancing foam magnesium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The first step, insulation treatment

[0027] With a box-type resistance furnace, the 30×30×30mm 3 The closed-cell AZ31 foamed magnesium alloy with a uniform porosity of 60% is subjected to heat preservation treatment at 480°C for 20 hours;

[0028] In the above treatment process, the AZ31 foamed magnesium alloy used is carried out under the condition that the volume ratio is ordinary casting silica sand: graphite powder = 1:2 mixture for protection, and the matrix material of the foamed magnesium alloy is completely covered with the mixture, and the covering layer The thickness is 6 cm above the highest point of the base material of the foamed magnesium alloy.

[0029] figure 1 It shows that the as-cast microstructure morphology of the AZ31 foamed magnesium alloy in this embodiment before heat preservation treatment is that a large amount of aggregated elements appear at the grain boundary, and more massive precipitates also appear inside the grain; figure 2 It sh...

Embodiment 2

[0037] In addition to the heat preservation process of the first step, the used AZ31 foamed magnesium alloy adopts a volume ratio of silica sand for ordinary casting: graphite powder=1:1 The mixture is protected under the condition that the matrix material of the foamed magnesium alloy is made of this mixture Complete coverage, the thickness of the covering layer is 5 cm higher than the highest point of the base material of the foamed magnesium alloy, and the others are the same as in Example 1.

Embodiment 3

[0039] In addition to the heat preservation treatment process of the first step, the used AZ31 foamed magnesium alloy adopts a volume ratio of silica sand for ordinary casting: graphite powder=1:6 The mixture is carried out under the protection condition, and the base material of the foamed magnesium alloy is made of the mixture Complete coverage, the thickness of the covering layer is 5.5 cm higher than the highest point of the base material of the foamed magnesium alloy, and the others are the same as in Example 1.

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Abstract

The invention provides a heat treatment technology for enhancing foam magnesium alloy, relating to the manufacture of alloy with open / close porosity. The heat treatment technology for enhancing the foam magnesium alloy comprises the steps of performing insulation treatment on a base body material of the foam magnesium alloy for 8-30 hours under the temperature of 400 DEG C to 600 DEG C by using a chamber type electric resistance furnace; and under the condition of room temperature, cooling the base body material of the foam magnesium alloy obtained in the first step and subjected to the insulation treatment to the room temperature so as to manufacture the foam magnesium alloy material which has good corrosion resisting performance in a corrosive medium. The heat treatment technology improves the corrosion resisting performance of the foam magnesium alloy, simultaneously guarantees the mechanical performance of the foam magnesium alloy and overcomes the defect that the corrosion resisting performance of the foam magnesium alloy of the prior art is poor under the as-cast condition.

Description

technical field [0001] The technical solution of the invention relates to the manufacture of alloys with open or closed pores, in particular to a heat treatment process for strengthening foamed magnesium alloys. Background technique [0002] Foam metal materials have a series of excellent properties such as small specific gravity, high specific stiffness, large specific surface area, good shock absorption performance, good sound insulation effect and high electromagnetic shielding performance, and are widely used in electronics, communications, chemical industry, metallurgy, machinery, construction, transportation , aerospace and defense industries have a wide range of applications. Compared with foamed aluminum, foamed magnesium alloy is considered to be a promising new material because of its higher specific stiffness and specific strength, and has received more and more attention in recent years. Extensive research has been carried out on the preparation method of foamed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/06
Inventor 夏兴川赵维民冯辉张欣陈晓伟张赞陈旭
Owner HEBEI UNIV OF TECH
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