A method and system for preparing magnesium alloy rods by layer-wound swaging

Abstract

The invention belongs to the field of preparation of heterogeneous materials, and in particular relates to a method and system for preparing magnesium alloy rods by layer-wound swaging. The method is to interleave two or more magnesium alloy wires with different precipitation behaviors on the magnesium alloy rod, and then perform multi-mode and multi-pass rotary forging, so that the two materials are deformed under the action of large pressure. Good metallurgical bonding is achieved. Finally, the precipitation of the second phase is regulated by aging heat treatment, and a high-strength and high-toughness precipitation-strengthened heterogeneous magnesium alloy rod is obtained. In the present invention, a series of multi-scale precipitation-strengthened heterogeneous magnesium alloy rods can be prepared by combining the deformation method of layer winding and rotary forging, combined with the subsequent solid solution aging heat treatment; the prepared heterogeneous magnesium alloy rods are to some extent It can have both the toughness of the soft phase and the strength of the hard phase to obtain good comprehensive mechanical properties.

Description

technical field [0001] The invention belongs to the field of preparation of heterogeneous materials, and in particular relates to a method and system for preparing magnesium alloy rods by layer-wound swaging. Background technique [0002] Magnesium alloy is currently the lightest structural metal material in practical application. It is 30-50% lighter than aluminum alloy and more than 50% lighter than steel. It has wide application prospects in transportation, aerospace and other fields. The material of choice for the environment. However, the strength and plasticity of magnesium alloys are poor, which limits its large-scale application in production. At present, the application scale of magnesium alloys is only 1 / 50 of that of the aluminum industry and 1 / 160 of that of the steel industry. Therefore, how to obtain high-strength and high-toughness magnesium alloy materials is a current research hotspot. [0003] After searching the literature of the prior art, it is found t...

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Problems solved by technology

However, this technology also has the following problems: (1) This method greatly improves the strength of magnesium alloys, but the plasticity has not changed significantly; (2) the addition of rare earth elements such as La, Ce, Nd, Yb, Y, etc. Production cost, difficult to apply in large quantities

However, this technology also has the following problems: (1) This surface nanotechnology can only form a thinner gradient structure layer on the surface of the sample. For thick plates, the influence of the gradient structure layer on the overall mechanical properties of the material is not obvious; (2) ) This method is suitable for plate processing and cannot prepare bars

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