Low-cost high-strength magnesium alloy and preparation method thereof

A magnesium alloy, low-cost technology, applied in the field of metal materials and metal material processing, can solve the problems of difficult to achieve large-scale commercial production, difficult to combine strength and plasticity of alloys, and high cost, to improve processing or production efficiency, good Flame retardant effect and strength improvement effect

Active Publication Date: 2019-01-22
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 adopt special deformation processing technology to improve strength so that it is difficult to realize large-scale commercial production, and the alloy It is difficult to have both strength and plasticity to limit its practical application, and to provide a low-cost high-strength magnesium alloy and its preparation method

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Design and select the Mg-3Bi-3Sn-2.5Al-1Zn-0.03Ca-0.02Y (wt%) alloy composition ratio to form a magnesium alloy. The preparation method includes the following steps:

[0044] 1) Ingredients: pure Mg (99.8wt%) ingot, pure Bi (99wt%) block, pure Sn (99wt%) block, pure Al (99.9wt%) block, pure Zn block (99wt%), Mg-20Ca and Mg-30Y master alloy is used as raw material, after surface pretreatment (such as removal of dirt, scale, etc., the same as in the following examples), the ingredients are formulated according to the above target components; mass ratio Bi:Sn=1:1;

[0045] 2) Melting: Clean and preheat the crucible, put the magnesium ingot preheated to 200°C into the crucible of the melting furnace, set the furnace temperature to 720°C, and heat slowly at a heating rate of 25°C / min. After it melts, add the pure Bi block preheated to 50°C, the pure Sn block, the pure Zn block, the pure Al block preheated to 200°C, the Mg-Ca master alloy and the Mg-Y master alloy into th...

Embodiment 2

[0054] (1) Design and select the Mg-3.5Bi-3.5Sn-2Al-1Zn-0.05Ca-0.02Y (wt%) alloy composition ratio to form a magnesium alloy. The preparation method includes the following steps:

[0055] 1) Ingredients: pure Mg (99.8wt%) ingot, pure Bi (99wt%) block, pure Sn (99wt%) block, pure Al (99.9wt%) block, pure Zn block (99wt%), Mg-20Ca and Mg-30Y master alloy is used as raw material, after surface pretreatment (such as removal of dirt, scale, etc., the same as in the following examples), the ingredients are formulated according to the above target components; mass ratio Bi:Sn=1:1;

[0056] 2) Melting: Clean and preheat the crucible, put the magnesium ingot preheated to 200°C into the crucible of the melting furnace, set the furnace temperature to 720°C, and heat slowly at a heating rate of 25°C / min. After it melts, add the pure Bi block preheated to 50°C, the pure Sn block, the pure Zn block, the pure Al block preheated to 200°C, the Mg-Ca master alloy and the Mg-Y master alloy into ...

Embodiment 3

[0065] (1) Design and select Mg-4Bi-4Sn-2Al-1Zn-0.03Ca-0.02Y (wt%) alloy composition ratio to form a magnesium alloy. The preparation method includes the following steps: mass ratio Bi:Sn=1:1;

[0066] 1) Ingredients: pure Mg (99.8wt%) ingot, pure Bi (99wt%) block, pure Sn (99wt%) block, pure Al (99.9wt%) block, pure Zn block (99wt%), Mg-20Ca and Mg-30Y master alloy is raw material, after surface pretreatment (as removing dirt, scale etc., following embodiment is the same), carry out batching according to above-mentioned target composition;

[0067] 2) Melting: Clean and preheat the crucible, put the magnesium ingot preheated to 200°C into the crucible of the melting furnace, set the furnace temperature to 720°C, and heat slowly at a heating rate of 25°C / min. After it melts, add the pure Bi block preheated to 50°C, the pure Sn block, the pure Zn block, the pure Al block preheated to 200°C, the Mg-Ca master alloy and the Mg-Y master alloy into the magnesium melt. In the magnes...

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Abstract

The invention relates to low-cost high-strength magnesium alloy and a preparation method thereof. The alloy is Mg-Bi-Sn-Al-Zn-Ca-Y magnesium alloy, and is prepared from the chemical components in percentage by mass: 2.0-4.5wt% of Bi, 2.0-4.5wt% of Sn, 1.0-3.0wt% of Al, 0.8-1.2wt% of Zn, 0.02-0.1wt% of Ca, 0.02-0.1wt% of Y and the balance magnesium and inevitable impurities; moreover, a mass ratioof the Bi to the Sn is (0.7 to 1.5) to 1. According to an obtained high-strength magnesium alloy material, the yield strength is 350-367 MPa, the tensile strength is 398-413 MPa, the ductility is higher than 14%, and the high-strength magnesium alloy material presents a good inflaming retarding effect, has a high strengthening phase melting point, and has application prospects as a potential heat-resistant magnesium alloy material.

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 magnesium alloy and a preparation method thereof; the novel magnesium alloy can be used as a potential heat-resistant magnesium alloy material. Background technique [0002] The density of magnesium is about 1.74g / cm 3 , It is 2 / 3 of aluminum alloy and 1 / 4 of steel. Due to its high specific strength and specific stiffness, excellent dimensional stability and damping and shock absorption, good die-casting forming performance and cutting performance, good electromagnetic shielding and heat dissipation effects, magnesium alloys are known as "green metal structural materials in the 21st century" , has received increasing attention. It has broad application prospects in the fields of automobiles, electronics, electrical appliances, transportation, aerospace and other fields. It is a lightweight metal structural material developed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00C22C1/03C22F1/06
CPCC22C1/03C22C23/00C22F1/002C22F1/06
Inventor 赵维民孟帅举李其智闻晶晶秦嘉楠余晖
Owner HEBEI UNIV OF TECH
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