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A mg-sn-sr-based high-strength and tough heat-resistant magnesium alloy

A mg-sn-sr, magnesium alloy technology, applied in the field of modification of room temperature performance and high temperature performance, can solve the problems of high economic cost of heat-resistant magnesium alloy, demanding molding process, and unsatisfactory room temperature performance, etc., to achieve strong Excellent toughness, good thermal stability, and low price

Inactive Publication Date: 2011-12-28
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] To sum up, the heat-resistant magnesium alloys currently developed have disadvantages such as high economic cost, demanding forming process requirements, especially unsatisfactory room temperature performance, etc., which limit the application of magnesium alloys to varying degrees.

Method used

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  • A mg-sn-sr-based high-strength and tough heat-resistant magnesium alloy
  • A mg-sn-sr-based high-strength and tough heat-resistant magnesium alloy
  • A mg-sn-sr-based high-strength and tough heat-resistant magnesium alloy

Examples

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Effect test

Embodiment 1-1

[0027] Example 1-1: A Zn-containing Mg-Sn-Sr based high-strength and tough heat-resistant magnesium alloy, the mass percentage of each component in the alloy is: 3 wt.% Sn, 2 wt.% Sr, 4 wt.% Zn, the balance being Mg and unavoidable impurities.

Embodiment 1-2

[0028] Example 1-2: A Mg-Sn-Sr-based high-strength and tough heat-resistant magnesium alloy containing Zn, the mass percentage of each component in the alloy is: 5 wt.% Sn, 2 wt.% Sr, 4 wt.% Zn, the balance being Mg and unavoidable impurities.

[0029] Example two: Al is added to the Mg-Sn-Sr based alloy.

Embodiment 2-1

[0030] Example 2-1: A Mg-Sn-Sr-based high-strength and tough heat-resistant magnesium alloy containing Al, the mass percentage of each component in the alloy is: 3 wt.% Sn, 2 wt.% Sr, 2 wt.% Al, the balance being Mg and unavoidable impurities.

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Abstract

The invention relates to a casting magnesium alloy material, and provides a Mg-Sn-Sr based high-strength, toughness and heat-resistant magnesium alloy with good comprehensive mechanical properties. The composition of the alloy is: Mg-xSn-ySr-zM, wherein 2wt%≤x≤7wt%, 0.5wt%≤y≤5wt%, 1wt%≤z≤7wt%, and M is at least one of Al and Zn elements, and the rest are Mg and unavoidable impurities. The tensile strength of the magnesium alloy of the present invention in the as-cast state can reach 240MPa, the yield strength is about 120MPa, the elongation can reach 12%, and the steady-state creep rate at 175°C and 55MPa is lower than that of the commercially available AJ52X alloy.

Description

technical field [0001] The invention belongs to the class of light metal magnesium alloy materials, and relates to the modification of the room-temperature performance and high-temperature performance of the magnesium alloy. Background technique [0002] Magnesium alloy, as the lightest metal structure material, will have a good application prospect in today's society where the task of energy saving and emission reduction is particularly heavy, because in aerospace, military industry, automobile and many other industries, weight reduction can reduce energy consumption. At the same time, magnesium alloy is known as the "green structural material" in the 21st century because of its light specific gravity, high specific strength and specific stiffness, strong damping, vibration and noise reduction capabilities, excellent liquid forming performance, and easy recycling. Although magnesium alloys have many advantages, there are also some disadvantages that limit their application...

Claims

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Application Information

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IPC IPC(8): C22C23/00C22C23/04C22C23/02
Inventor 陈云贵李世成肖素芬
Owner SICHUAN UNIV
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