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High strength AZ31-CaO magnesium alloy and preparing method thereof

A magnesium alloy, high-strength technology, applied in the field of metal materials, can solve the problems of insufficient effect, high modification cost, insufficient performance of magnesium alloy materials, etc., and achieve the effect of reducing material cost, improving mechanical properties, and facilitating industrial production.

Inactive Publication Date: 2017-12-08
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the shortcomings of the existing technology such as insufficient performance of magnesium alloy materials, relatively high modification cost, and insufficient effect, the present invention provides a high-strength AZ31-CaO magnesium alloy and its preparation method

Method used

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  • High strength AZ31-CaO magnesium alloy and preparing method thereof
  • High strength AZ31-CaO magnesium alloy and preparing method thereof
  • High strength AZ31-CaO magnesium alloy and preparing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] The high-strength AZ31-CaO magnesium alloy of the present embodiment comprises the following components: AZ31 commercial magnesium alloy, 0wt% CaO (wt% refers to the weight of each component accounts for the percentage of target alloy total weight, and this total weight is AZ31 commercial magnesium alloy total weight).

[0036] The preparation method is as follows:

[0037] Melting process: the whole melting process is in SF 6 and CO 2 Under the condition of mixed gas protection. Weigh the AZ31 commercial magnesium alloy according to the formula quantity, and then bake the weighed raw material at 180° C. for more than 3 hours. Put the dried AZ31 commercial magnesium alloy into the SF 6 and CO 2 Heat and melt in a crucible resistance furnace protected by mixed gas to obtain molten AZ31 magnesium liquid. When the temperature of the magnesium liquid rises to 720°C, keep the temperature constant. Sprinkle the pre-weighed refining agent evenly on the magnesium liquid an...

Embodiment 2

[0042] The high-strength magnesium alloy of the present embodiment comprises the following components in mass percent: AZ31 commercial magnesium alloy, the CaO of 1wt% (wt% refers to the percentage that the weight of each component accounts for the total weight of target alloy, and this total weight is AZ31 total weight of commercial magnesium alloys).

[0043] The preparation method is as follows:

[0044] Melting process: the whole melting process is in SF 6 and CO 2 Under the condition of mixed gas protection. Weigh the AZ31 commercial magnesium alloy according to the formula quantity, and then bake the weighed raw material at 180° C. for more than 3 hours. Put the dried AZ31 commercial magnesium alloy into the SF 6 and CO 2 Heat and melt in a crucible resistance furnace protected by mixed gas to obtain molten AZ31 magnesium liquid. When the temperature of the magnesium liquid rises to 740°C, keep the temperature constant. Use a stainless steel bell jar to press the Ca...

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Abstract

The invention belongs to the technical field of metal materials, and relates to a high strength AZ31-CaO magnesium alloy and a preparing method thereof. According to the allot, a certain mass of CaO is added into an AZ31 magnesium alloy, refining, casting, homogenization treatment and plastic deformation are carried out, and the AZ31-CaO magnesium alloy is obtained. By means of the alloy, casting state crystalline grains are refined, the strengthening phase with the high temperature stability is formed, the strengthening effect is achieved, the newly-generated high temperature stabilization strengthening phase during plastic deformation promotes recrystallization, and therefore the AZ31-CaO alloy has the excellent mechanical property, and the strength of extension is greatly improved under the condition that the ductility is basically kept unchanged.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and specifically relates to a magnesium alloy and a preparation method thereof, in particular to a high-strength AZ31-CaO magnesium alloy and a preparation method thereof. Background technique [0002] Magnesium (Mg) alloy has the advantages of low density, wide source, high specific strength and specific stiffness, etc., and is known as "green engineering material in the 21st century". Among cast magnesium alloys, magnesium-aluminum alloys are currently one of the most widely used cast magnesium alloy systems due to their low cost, easy casting and processing, and good overall performance. The most representative ones are AZ31, AZ61, AZ80, AZ91 and AM60 etc. Among them, AZ31 is currently the most widely used commercial magnesium alloy, because of its good mechanical and formability properties, it has broad application prospects in the automotive and 3C fields. One of the major problems...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/02C22C32/00C22C1/10C22C1/06C22C1/02
CPCC22C1/02C22C1/06C22C1/1036C22C23/02C22C32/0036C22C1/1047
Inventor 卢雅琳封爱成张扬李兴成周东帅王健徐文婷
Owner JIANGSU UNIV OF TECH
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