Effective method for improving plastic molding capacity of high-strength Mg-Gd-Y-Nd-Zr magnesium alloy

A technology for plastic forming and magnesium alloys, which is applied in the field of plasticity improvement of high-strength magnesium alloys, can solve the problems of poor plastic forming ability of high-strength magnesium alloys, and achieve the improvement of plastic deformation coordination ability, simple processing technology operation, and strong plastic forming ability Effect
CN107964602AActive Publication Date: 2018-04-27INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Publication Date
2018-04-27

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Abstract

The invention relates to the field of plasticity improvement of high-strength magnesium alloys, in particular to a method for improving plastic molding cavity of a high-strength Mg-Gd-Y-Nd-Zr magnesium alloy by effectively using an element Li, and solves the problem of weaker high-strength plasticity. Under the precondition of keeping relative contents of all elements in the alloy invariable, 5-20weight% of Li element is added to form a beta-Li phase with higher plasticity deformation capacity in the alloy; the volume fraction (20-90%) of forming the beta-Li phase is controlled to prepare a lithium-contained Mg-Gd-Y-Nd-Zr alloy with high strength and better plasticity; the alloy is smelted and hot rolled subsequently to prepare a plate; and the machining process is simple and convenient to operate. The tensile strength of the material under cast-state condition is ob=120-250 MPa, the yield strength is o0.2=80-150 MPa, the ductility is delta=10-30%, and the density is 1.50-1.89 g / cm3;and the plate cannot generate the edge cracking phenomenon after deformation with 40% of rolling quantity at room temperature.
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Description

technical field

[0001] The invention relates to the field of improving the plasticity of high-strength magnesium alloys, in particular to a method for effectively utilizing element Li to improve the plastic forming ability of high-strength Mg-Gd-Y-Nd-Zr magnesium alloys. Background technique

[0002] Among all metal structural materials, the density of magnesium alloy is the lowest, which is 2 / 3 of that of aluminum alloy and 1 / 4 of that of stainless steel. If magnesium alloy materials can mostly replace stainless steel and aluminum alloys in aircraft and vehicles, it will not only achieve the purpose of reducing weight and speed, but also effectively solve a series of problems related to energy saving and environmental protection. At the same time, magnesium alloys also have the advantages of high specific strength and specific stiffness, strong resistance to high-energy particle penetration, good electromagnetic shielding performance, good damping performance, and excellent...

Claims

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