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High strength and high-toughness wrought magnesium alloy and preparation methodthereof

A technology for deforming magnesium alloys and magnesium alloys, which is applied in the field of metal materials and metal material processing, can solve the problems of high cost, low plasticity of high-strength alloy materials, and difficulty in realizing large-scale commercial production, and achieve low cost and low final rolling temperature , the effect of inhibiting the growth of recrystallized grains

Active Publication Date: 2019-01-25
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at high cost due to the large use of various rare earth elements or high-priced alloy elements existing in existing high-strength magnesium alloys, or the use of special deformation processing techniques to improve strength so that it is difficult to realize mass commercial production, and due to the high-strength alloy materials Low plasticity limits its practical application and other issues, providing a low-cost high-strength toughness deformed magnesium alloy and its preparation method

Method used

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  • High strength and high-toughness wrought magnesium alloy and preparation methodthereof
  • High strength and high-toughness wrought magnesium alloy and preparation methodthereof
  • High strength and high-toughness wrought magnesium alloy and preparation methodthereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] (1) Design and select the Mg-4Bi-4Sn-1Zn-0.2Ca-0.2Y (wt%) alloy composition ratio to form a magnesium alloy. The preparation method includes the following steps:

[0042] 1) Ingredients: Using pure Mg (99.8wt%) ingot, pure Bi (99wt%) block, pure Sn (99wt%) block, pure Zn block (99wt%), Mg-20Ca and Mg-30Y master alloy as raw materials, after After surface pretreatment (such as removal of dirt, scale, etc., the same as in the following examples), the ingredients are formulated according to the target alloy composition; (mass ratio Bi:Sn=1:1)

[0043] 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 20°C / min. After it melts, add the pure Bi block preheated to 50°C, pure Sn block, pure Zn block, Mg-Ca master alloy and Mg-Y master alloy preheated to 200°C into the magnesium melt; Furnace temperature to 740°C, keep warm fo...

Embodiment 2

[0052] (1) Design and select the Mg-3Bi-3Sn-1Zn-0.15Ca-0.2Y (wt%) alloy composition ratio to form a magnesium alloy. The preparation method includes the following steps:

[0053] 1) Ingredients: Using pure Mg (99.8wt%) ingot, pure Bi (99wt%) block, pure Sn (99wt%) block, pure Zn block (99wt%), Mg-20Ca and Mg-30Y master alloy as raw materials, after 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-mentioned target alloy composition; (mass ratio Bi:Sn=1:1;)

[0054] 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 20°C / min. After it melts, add the pure Bi block preheated to 50°C, pure Sn block, pure Zn block, Mg-Ca master alloy and Mg-Y master alloy preheated to 200°C into the magnesium melt; Furnace temperature to 7...

Embodiment 3

[0063] (1) Design and select Mg-2.5Bi-2.5Sn-1Zn-0.1Ca-0.1Y (wt%) alloy composition ratio to form a magnesium alloy. The preparation method includes the following steps:

[0064]1) Ingredients: Using pure Mg (99.8wt%) ingot, pure Bi (99wt%) block, pure Sn (99wt%) block, pure Zn block (99wt%), Mg-20Ca and Mg-30Y master alloy as raw materials, after 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-mentioned target alloy composition; (mass ratio Bi:Sn=1:1;)

[0065] 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 20°C / min. After it melts, add the pure Bi block preheated to 50°C, pure Sn block, pure Zn block, Mg-Ca master alloy and Mg-Y master alloy preheated to 200°C into the magnesium melt; Furnace temperature to 740...

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Abstract

The invention relates to a high-strength and high-toughness wrought magnesium alloy and a preparation method thereof. The alloy refers to Mg-Bi-Sn-Zn-Ca-Y magnesium alloy. The alloy includes the following components: by mass, 2.0-4.5 wt% of Bi, 2.0-4.5 wt% of Sn, 0.8-1.2 wt% of Zn, 0.1-0.3 wt% of Ca, 0.1-0.3 wt% of Y and the balance Mg and inevitable impurities; and the mass ratio of Bi to Sn is (0.7-1.5):1. The yield strength of the obtained alloy is 360 MPa or above, the tensile strength is more than 400 MPa, and the elongation rate is 12% or above. Moreover, the alloy has a good flame retardant effect and low cost and the mass production is easily achieved.

Description

technical field [0001] The invention relates to the field of metal materials and metal material processing, in particular to a high-strength and toughness deformed 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] Magnesium alloy has many advantages such as high specific strength, high specific stiffness, good casting performance, good electromagnetic shielding performance, excellent cutting performance, and easy recycling and reuse, making it widely used in the fields of electronics, aerospace and rail transit , especially as the demand for weight reduction, energy saving and environmental protection in the modern automobile industry is becoming more and more urgent, the development of low-cost lightweight high-strength magnesium alloys to promote their industrial applications has attracted more and more attention from various countries. [0003] Howev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00C22C1/03C22F1/06
CPCC22C1/03C22C23/00C22F1/06
Inventor 赵维民孟帅举周君李永胜李其智余晖范少达
Owner HEBEI UNIV OF TECH
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