Preparation and treatment process of Mg-Gd-Y-Zr alloy

A treatment process and alloy technology, which is applied in the field of Mg-Gd-Y-Zr alloy preparation and its treatment process, to achieve the effect of obvious changes in mechanical properties such as hardness and strength

Inactive Publication Date: 2016-04-27
黄晓艺
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  • Abstract
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Problems solved by technology

However, there are few research reports on the effect of heat treatment on the properties of alloys, and most of them focus on as-cast alloys.

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  • Preparation and treatment process of Mg-Gd-Y-Zr alloy
  • Preparation and treatment process of Mg-Gd-Y-Zr alloy
  • Preparation and treatment process of Mg-Gd-Y-Zr alloy

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Embodiment Construction

[0008] Mg-12Gd-3Y-0.6Zr (mass fraction, the same below) alloy was prepared by ingot metallurgy. The experimental materials are industrial pure magnesium, magnesium-gadolinium (30.47%Gd) master alloy, magnesium-yttrium (31.72%Y) master alloy and magnesium-zirconium (30.16%Zr) master alloy. Melting at 730-750°C, protected by CO2+SF6 mixed gas. Cast into a round ingot of quasi-180mm, after homogenized annealing at 530°C for 24 hours, then extrude at 450°C with an extrusion ratio of 16:1. The extruded alloy rods are subjected to three heat treatments: solid solution (T4), aging (T5) and solid solution + aging (T6). The determination of the heat treatment system refers to the magnesium alloy phase diagram, see Table 1 for details. During solid solution treatment, warm water at 70-80°C is used for cooling. HVS-1000 digital display microhardness tester is used to measure the hardness of alloy samples in various states, the load is 4.9N, and the load is 15s. The hardness test value ...

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Abstract

The invention discloses preparation of an Mg-Gd-Y-Zr alloy. The preparation is characterized in that an ingot metallurgy method is adopted to prepare an Mg-12Gd-3Y-0.6Zr alloy in percentage by mass: industrial pure magnesium, 30.47% of Gd magnesium gadolinium intermediate alloy, 31.72% of Y magnesium yttrium intermediate alloy and 30.16% of Zr magnesium zirconium intermediate alloy are molten at 730-750 DEG C, are protected by using CO2+SF6 mixed gas, are poured, and are uniformly annealed for 24 h at 530 DEG C. The annealed Mg-Gd-Y-Zr alloy is extruded at 450 DEG C; the extrusion rate is 16: 1; and the T5 aging treatment is performed for the extruded alloy.

Description

technical field [0001] The invention relates to the preparation and treatment process of a Mg-Gd-Y-Zr alloy. Background technique [0002] Magnesium alloy is currently the lightest metal structural material in engineering applications. It has the advantages of high specific strength and specific stiffness, good machinability, and easy recycling. It has broad application prospects in the fields of automobiles, electronics, and aerospace. Mg-Gd-Y-Zr alloys have attracted more and more attention because of their high strength and heat resistance. At present, the research on this series of alloys mainly includes the following aspects: the influence of alloying, such as the influence of adjusting the ratio of Gd and Y atoms, and the composition of Zn on the alloy; the influence of processing deformation, such as extrusion, rolling preparation High-performance wrought alloys; the influence of heat treatment, such as determining the best solid solution system, the process of super...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/06C22C1/03C22F1/06
Inventor 黄晓艺
Owner 黄晓艺
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