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Cheap high-strength heat-resistant deforming magnesium alloy

A heat-resistant deformation and magnesium alloy technology, applied in the field of deformed magnesium alloys, can solve the problems of insufficient heat resistance of magnesium alloys, achieve the effects of low cost, simple process, and improved tensile strength at room temperature and high temperature

Inactive Publication Date: 2005-05-11
江苏锦绣铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the lack of high-temperature strength and heat resistance of existing magnesium alloys, and propose a cheap Ca-containing high-strength heat-resistant deformable magnesium alloy. By adding Ca to refine the as-cast structure, a high-melting heat-resistant phase Al is generated. 2 The Ca phase makes it overcome the problem of insufficient heat resistance of magnesium alloys. At the same time, through the plastic deformation process, the as-cast structure is broken, refined and dense.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Alloy composition (percentage by weight): 8.0% Al, 2.0% Ca, 0.3% Mn, 0.1% Zn, impurity elements are less than 0.02%, and the rest is Mg.

[0014] The preparation process of cheap Ca-containing high-strength heat-resistant deformable magnesium alloy is as follows: (1) configure the alloy according to the above composition, add industrial pure magnesium into the resistance crucible furnace, and use FS 6 0.5% / CO 2 Mixed gas protection; (2) After the magnesium is completely melted, add industrial pure aluminum, industrial pure zinc, industrial pure calcium, and Al-10Mn master alloy at 650°C; (3) Raise the temperature of the magnesium alloy solution to 720°C and keep it warm for 20 Stir for 3 minutes after 1 minute to fully melt the alloy elements; (4) Continue to keep warm at 720°C for about 15 minutes. After the alloy elements are completely dissolved, stir the alloy liquid with tools to make the ingredients even Leave it for 10 minutes, then scoop out the scum on the sur...

Embodiment 2

[0016] Alloy composition (percentage by weight): 3.0% Al, 0.5% Ca, 1.0% Mn, 1.0% Zn, impurity elements are less than 0.02%, and the rest is Mg.

[0017] The preparation process of the cheap Ca-containing high-strength heat-resistant deformable magnesium alloy is as follows: (1) configure the alloy according to the above-mentioned composition, add industrial pure magnesium in the resistance crucible furnace, heat and melt, and sprinkle a small amount of covering agent (JDF) on the bottom of the crucible at the same time; 2) After the magnesium is completely melted, add industrial pure aluminum, industrial pure zinc, industrial pure calcium, and Al-10Mn master alloy at 650°C; (3) heat the magnesium alloy solution to 720°C, keep it warm for 20 minutes, and then stir for 6 minutes to fully melt the alloying elements; (4) continue to keep warm at 720°C for about 15 minutes, after all the alloying elements are dissolved, stir the alloy liquid with tools to make the composition unifor...

Embodiment 3

[0019] Alloy composition (percentage by weight): 9.0% Al, 2.5% Ca, 0.1% Mn, 0.05% Zn, impurity elements are less than 0.02%, and the rest is Mg.

[0020] The preparation process of the cheap Ca-containing high-strength heat-resistant deformable magnesium alloy is as follows: (1) configure the alloy according to the above-mentioned composition, add industrial pure magnesium in the resistance crucible furnace, heat and melt, and sprinkle a small amount of covering agent (JDF) on the bottom of the crucible at the same time; 2) After the magnesium is completely melted, add industrial pure aluminum, industrial pure zinc, industrial pure calcium, and Al-10Mn master alloy respectively at 700°C; (3) heat the magnesium alloy solution to 720°C, keep it warm for 20 minutes, and then stir for 5 minutes to fully melt the alloying elements; (4) continue to keep warm at 720°C for about 15 minutes, after all the alloying elements are dissolved, stir the alloy liquid with a tool to make the com...

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Abstract

The invention was involved in the preparation method of high intensity heat resisting magnesium alloy containing Ca. The alloy consist of 3-9%Al, 0.5-2.5% Ca, 0.1-1% Mn,0.05-1.0%Zn, impurity which was composed with <0.005%Fe, <0.015%Cu and <0.002% Ni and the rest was Mg. The invention wasn't involved rare metal, the cost was low and the technology was simple. The strength of extension under room temperature / high temperature(150deg.C), yield strength, extensibility and creep resistance were improved magnesium alloy obviously. Fine texture of magnesium alloy was refined obviously. The shape of Al2Ca was changed into small stick from thick Chinese character. Continuous distribution of magnesium alloy was changed into isolated diffusion distribution.

Description

technical field [0001] The invention relates to a deformed magnesium alloy, in particular to a cheap Ca-containing high-strength heat-resistant deformed magnesium alloy. Used in the field of metal materials. Background technique [0002] Magnesium alloy has high specific strength, specific stiffness, specific elastic modulus and high electrostatic shielding property, and is known as the green metal of the 21st century. At present, the main reason why magnesium alloys have not been widely used in industries such as automobiles, military industry, aviation, and electronic appliances on a large scale is that 90% of magnesium alloy products are obtained from die-casting processes, which limits the variety and type of products; 90% are limited to small structural parts used at room temperature. Conventional Mg-Al-based magnesium alloys such as AM50A, AZ31 and AZ91D have excellent casting properties and low cost, but their high-temperature strength and heat resistance are poor, ...

Claims

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Application Information

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IPC IPC(8): C22C23/02
Inventor 陈永军王渠东翟春泉丁文江
Owner 江苏锦绣铝业有限公司
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