Low-cost, high-strength and high-toughness wrought magnesium alloy and preparation method thereof

A wrought magnesium alloy, low-cost technology, applied in the field of metal materials and metal material processing, can solve the problems of high cost, difficult to achieve mass commercial production, etc., to improve strength and toughness, excellent room temperature mechanical properties, raw materials and processing costs cheap effect

Active Publication Date: 2019-01-11
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the existing high-strength magnesium alloys that use a large number of rare earth elements or high-priced alloy elements to cause excessive cost, or use special deformation processing technology to improve strength, so that it is difficult to realize large-scale commercial production. Provide a low-cost high-strength toughness deformed magnesium alloy and its preparation method

Method used

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  • Low-cost, high-strength and high-toughness wrought magnesium alloy and preparation method thereof
  • Low-cost, high-strength and high-toughness wrought magnesium alloy and preparation method thereof
  • Low-cost, high-strength and high-toughness wrought magnesium alloy and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0043] (1) Design and select the Mg-7.3Al-2.7Bi-0.03Ca-0.02Y (wt%) alloy composition ratio to form a magnesium alloy. The preparation method includes the following steps: (the sum of the Al element and the Bi element quality is the total mass of the alloy 10%)

[0044] 1) Ingredients: Use pure Mg (99.8wt%) ingots, pure Bi (99wt%) blocks, pure Al (99.9wt%) blocks, Mg-20Ca and Mg-30Y master alloys as raw materials, after surface pretreatment (such as removing Dirt, scale etc., following embodiment is the same), carry out batching by the weight percent of above-mentioned magnesium alloy as target composition;

[0045] 2) Casting: set the furnace temperature to 720°C, heat slowly, and the heating rate is 30°C / min. At the same time, clean the crucible and put it in the furnace for preheating. Put the ingot into the crucible of the smelting furnace, and after it melts, add the pure Bi block preheated to 50°C, the pure Al block preheated to 200°C, the Mg-20Ca master alloy and the Mg...

Embodiment 2

[0053] (1) Design and select the Mg-8Al-2.0Bi-0.03Ca-0.02Y (wt%) alloy composition ratio to form a magnesium alloy. The preparation method includes the following steps: (the sum of the Al element and the Bi element mass is 10% of the total mass of the alloy %)

[0054] 1) Ingredients: use pure Mg (99.8wt%) ingot, pure Bi (99wt%) block, pure Al (99.9wt%) block, Mg-20Ca and Mg-30Y master alloy as raw materials, after surface pretreatment, according to the above The weight percentage of the magnesium alloy is the target composition for batching;

[0055] 2) Casting: set the furnace temperature to 720°C, heat slowly, and the heating rate is 30°C / min. At the same time, clean the crucible and put it in the furnace for preheating. Put the ingot into the crucible of the smelting furnace, and after it melts, add the pure Bi block preheated to 50°C, the pure Al block preheated to 200°C, the Mg-20Ca master alloy and the Mg-30Y master alloy in turn. In magnesium melt; keep warm for 10 m...

Embodiment 3

[0063] (1) Design and select the Mg-7Al-3Bi-0.03Ca-0.02Y (wt%) alloy composition ratio to form a magnesium alloy. The preparation method includes the following steps: (the sum of the Al element and the Bi element mass is 10% of the total mass of the alloy )

[0064] 1) Ingredients: use pure Mg (99.8wt%) ingot, pure Bi (99wt%) block, pure Al (99.9wt%) block, Mg-20Ca and Mg-30Y master alloy as raw materials, after surface pretreatment, according to the above The weight percentage of the magnesium alloy is the target composition for batching;

[0065]2) Casting: set the furnace temperature to 720°C, heat slowly, and the heating rate is 30°C / min. At the same time, clean the crucible and put it in the furnace for preheating. Put the ingot into the crucible of the smelting furnace, and after it melts, add the pure Bi block preheated to 50°C, the pure Al block preheated to 200°C, the Mg-20Ca master alloy and the Mg-30Y master alloy in turn. In magnesium melt; keep warm for 10 minut...

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Abstract

The invention discloses a low-cost, high-strength and high-toughness wrought magnesium alloy and a preparation method thereof. The alloy is a Mg-Al-Bi-Ca-Y magnesium alloy and comprises the chemical components of 6.0-8.5 wt% of Al, 1.5-4 wt% Bi, 0.02-0.1 wt% of Ca, 0.02-0.1 wt% of Y, and the balance being magnesium and unavoidable impurities, wherein the sum of the mass of the Al and Bi is less than or equal to 10% of the total mass of the alloy. The alloy has a yield strength of about 360 MPa, a tensile strength of about 410 MPa, and an elongation of 15% or above; and the alloy exhibits a good flame retardant effect.

Description

technical field [0001] The invention relates to the field of metal materials and metal material processing, in particular to a low-cost high-strength toughness deformed magnesium alloy and a preparation method thereof; the novel magnesium alloy can be used as a potential heat-resistant magnesium alloy and a biomedical magnesium alloy material. Background technique [0002] Magnesium alloy is currently the lightest commercial metal structure material, which has the advantages of high specific strength and rigidity, strong shock absorption, electromagnetic shielding and radiation resistance, easy cutting and processing, and recyclable. It is developed after steel and aluminum alloy. Lightweight metal structural materials have broad application prospects in the fields of automobiles, electronics, electrical appliances, transportation, aerospace, etc., and are known as the green engineering materials of this century. [0003] However, the low absolute strength and poor corrosion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C23/02C22F1/06
CPCC22C1/03C22C23/02C22F1/002C22F1/06
Inventor 孟帅举韩海生李永胜范少达闻晶晶余晖郭家美赵维民
Owner HEBEI UNIV OF TECH
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