Fine grain, high strength and deformed magnesium alloy material

Abstract

The present invention provides a high-strength deformation magnesium alloy material having a stable fine-grained structure. The alloy comprises the following components by weight: zincium of 8.5%-9.5%, zirconium of 0.4%-0.8%, rare earth erbium of 0.4%-4.0% and magnesium and ineluctable foreign matters of the rest.Without applying especial processes such as equidistant channel extrusion pressing, fast cooling and the like, stable fine grain tissue of a size of 2-10mum can be obtained through a deformation process by a deformation apparatus of extrusion pressing, rolling, smithing and the like in the common industry, mechanical performances guidelines of materials such as strength, plastic property, work hardening index and the like can be adjusted effectively to satisfy the requirements of use characteristic and processability of finished products or half-finished products.

Description

technical field [0001] The invention relates to a magnesium alloy material, in particular to a deformed magnesium alloy with stable fine grain structure and high strength. It belongs to the technical field of metal materials. Background technique [0002] Magnesium alloy is the lightest industrial structural material. In recent years, it has received more and more attention in 3C, aerospace, transportation and other industries. However, the development and application of magnesium alloys is far behind that of aluminum alloys. There are two main reasons for this: first, the absolute strength of magnesium is insufficient; second, the plastic deformation ability of magnesium is poor, and it cannot meet the requirements of many industrial products and equipment. It is well known that in the strengthening mechanism of metal materials, only grain refinement can not only improve the strength of the material but also improve the plasticity of the material. At present, there are tw...

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Problems solved by technology

However, the commercial magnesium alloys currently used have insufficient thermal deformation fine-grained structure stability, and there is a tendency for large grain growth during cooling to room temperature after hot working, which leads to a decrease in the plasticity of magnesium alloy products.

In order to preserve the fine-grained structure after hot deformation, rapid cooling is generally used in production; but even so, since the hot-worked magnesium alloy products usually need to undergo subsequent warm, hot processing or heat treatment to adjust its internal structure , appearance size and performance to meet different requirements for use, and grain growth will still occur in these processes

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