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Multi-element composite enhanced magnesium alloy with high strength and low cost and preparation method thereof

A magnesium alloy, high-strength technology, applied in the field of magnesium alloys, can solve the problems of reducing the mechanical properties of the alloy, deteriorating the mechanical properties of the alloy, increasing the cost of the magnesium alloy, etc., and achieving the effects of improving the mechanical properties, increasing the preparation cost, and improving the mechanical properties of the alloy.

Inactive Publication Date: 2018-06-08
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mn element can remove harmful impurities such as Si and Fe in magnesium alloy, and can refine the grain; Cu element can refine the as-cast structure of the alloy by forming AlCuMg phase, but the thermal stability of AlCuMg phase is very high. It is difficult to be crushed during the process, too much AlCuMg phase will reduce the mechanical properties of the alloy; Ca element can inhibit the grain growth, and at the same time form Al 2 Ca improves the mechanical properties, and with the increase of Ca content, Al 2 Ca distributes continuously at the grain boundary, which deteriorates the mechanical properties of the alloy; Sn has a high solid solubility in magnesium alloys and has a good strengthening effect, but Sn is expensive, and adding too much Sn will significantly increase the cost of magnesium alloys

Method used

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  • Multi-element composite enhanced magnesium alloy with high strength and low cost and preparation method thereof
  • Multi-element composite enhanced magnesium alloy with high strength and low cost and preparation method thereof
  • Multi-element composite enhanced magnesium alloy with high strength and low cost and preparation method thereof

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Embodiment 1

[0023] A multi-element composite strengthened high-strength low-cost magnesium alloy, the magnesium alloy raw material element content is as follows: Al content 3.0%, Zn element content 1.1%, Mn element content 0.1%, Sn element content 0.1%, Ca Element content 0.1%, Cu element content 0.1%, unavoidable impurity ≤ 0.15%, balance Mg.

[0024] A method for preparing a high-strength low-cost magnesium alloy strengthened by multi-element composite, comprising the following steps:

[0025] 1) Weigh pure Al, pure Zn, pure Sn, Mg-Mn master alloy, Mg-Ca master alloy, Mg-Cu master alloy and magnesium ingot respectively, and place the magnesium ingot, Mg-Mn master alloy and pure Sn in the Smelting at about 690°C-710°C, after the magnesium ingot, magnesium-manganese master alloy and pure Sn are melted, add pure Al, pure Zn, Mg-Ca master alloy and Mg-Cu master alloy, keep warm for 30 minutes, and then control the temperature of the furnace body At about 700°C, continue to pass argon into ...

Embodiment 2

[0028] A multi-element composite strengthened high-strength low-cost magnesium alloy, the magnesium alloy raw material element content is as follows: Al content 6.0%, Zn element content 1.2%, Mn element content 0.1%, Sn element content 0.1%, Ca Element content 0.1%, Cu element content 0.1%, unavoidable impurity ≤ 0.15%, balance Mg.

[0029] A method for preparing a high-strength low-cost magnesium alloy strengthened by multi-element composite, comprising the following steps:

[0030]1) Weigh pure Al, pure Zn, pure Sn, Mg-Mn master alloy, Mg-Ca master alloy, Mg-Cu master alloy and magnesium ingot respectively, and place the magnesium ingot, Mg-Mn master alloy and pure Sn in the Smelting at about 690°C-710°C, after the magnesium ingot, magnesium-manganese master alloy and pure Sn are melted, add pure Al, pure Zn, Mg-Ca master alloy and Mg-Cu master alloy, keep warm for 30 minutes, and then control the temperature of the furnace body At about 700°C, continue to pass argon into t...

Embodiment 3

[0033] A multi-element composite strengthened high-strength low-cost magnesium alloy, the magnesium alloy raw material element content is as follows: Al content 3.0%, Zn element content 1.2%, Mn element content 0.3%, Sn element content 0.3%, Ca The element content is 0.3%, the Cu element content is 0.3%, the unavoidable impurity is ≤0.15%, and the balance is Mg.

[0034] A method for preparing a high-strength low-cost magnesium alloy strengthened by multi-element composite, comprising the following steps:

[0035] 1) Weigh pure Al, pure Zn, pure Sn, Mg-Mn master alloy, Mg-Ca master alloy, Mg-Cu master alloy and magnesium ingot respectively, and place the magnesium ingot, Mg-Mn master alloy and pure Sn in the Smelting at about 690°C-710°C, after the magnesium ingot, magnesium-manganese master alloy and pure Sn are melted, add pure Al, pure Zn, Mg-Ca master alloy and Mg-Cu master alloy, keep warm for 30 minutes, and then control the temperature of the furnace body At about 700°...

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Abstract

The invention relates to a multi-element composite enhanced magnesium alloy with high strength and low cost and a preparation method thereof. The multi-element composite enhanced magnesium alloy is prepared from the following elements of 2.5% to 6.5% of Al (aluminum), 0.6% to 1.5% of Zn (zinc), 0.1% to 0.4% of Mn (manganese), 0.1% to 0.4% of Sn (stannum), 0.1% to 0.4% of Ca (calcium), 0.1% to 0.4%of Cu (copper), 0.15% or less of unavoidable impurities, and the balance of Mg (magnesium). The prepared multi-element composite enhanced magnesium alloy has the advantages that the tensile strengthand compressive strength are greatly improved, and the deterioration of elongation rate is avoided; the magnesium alloy material can be prepared through alloying by adding a small amount of alloy elements, the deformation is completed on common deformation processing equipment, the alloy cost is not obviously increased, the property is high, and the commercial value is high; the application rangeof magnesium alloy is effectively expanded.

Description

technical field [0001] The invention belongs to the field of magnesium alloys, and relates to a multi-element composite strengthened high-strength and low-cost magnesium alloy, and also relates to a preparation method of the magnesium alloy. Background technique [0002] Magnesium alloy is the lightest metal structure material, which has a series of advantages such as good shock absorption, good electromagnetic shielding, and good cutting performance. Magnesium alloy has a very wide application prospect in aerospace, automotive industry and electronic products. Although magnesium alloys have excellent properties, they also have a series of shortcomings such as low absolute strength and high cost, which limit the application of magnesium alloys. In order to further improve the mechanical properties of magnesium alloys, two methods are generally adopted, one is by adding alloy elements, and the other is by large deformation treatment. Adding alloying elements to magnesium all...

Claims

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Application Information

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IPC IPC(8): C22C23/02C22C1/03C22F1/06
CPCC22C23/02C22C1/03C22F1/06
Inventor 余大亮张丁非兰伟曹献龙戴庆伟柴森森邓洪达曹鹏军
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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