Method for preparing reinforced magnesium alloy block-coated magnesium alloy bar

Abstract

The invention relates to a method for preparing a reinforced magnesium alloy block-coated magnesium alloy bar. Due to the disadvantages of the mechanical property of magnesium alloy, the cylindrical material of the reinforced magnesium alloy block-coated magnesium alloy bar is prepared through casting, doping, coating and hot pressing; the internal part of the material is the cylindrical magnesium alloy bar, and the external part is in a circular ring shape; the cylinder is firmly combined with the circular ring, so that the compactness is excellent. The preparation method is advanced and compact in process, detailed and accurate in data, and is an ideal method for preparing the reinforced magnesium alloy block-coated magnesium alloy bar; the prepared coated composite material is high in strength and stable in mechanical property.

Description

technical field [0001] The invention relates to a preparation method of a reinforced magnesium alloy block-coated magnesium alloy rod, which belongs to the technical field of improving mechanical properties and application of non-ferrous metal alloys. Background technique [0002] Among practical metal materials, magnesium alloy has the lowest density and is the lightest metal structural material that can be used in nature; due to the low modulus, low strength, low wear resistance, high thermal expansion coefficient and poor high temperature performance of magnesium alloys, magnesium alloys are limited. The scope of application of the alloy. [0003] In order to improve the mechanical properties of magnesium alloys, some strengthening methods are often adopted in the preparation process, such as equal channel extrusion method, doping metal method, casting doped ceramic particle method, hot pressing coating method, hot pressing strengthening method, etc. These Most of the me...

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Problems solved by technology

[0002] Among practical metal materials, magnesium alloy has the lowest density and is the lightest metal structural material that can be used in nature; due to the low modulus, low strength, low wear resistance, high thermal expansion coefficient and poor high temperature performance of magnesium alloys, magnesium alloys are limited. The scope of application of the alloy

[0003] In order to improve the mechanical properties of magnesium alloys, some strengthening methods are often adopted in the preparation process, such as equal channel extrusion method, doping metal method, casting doped ceramic particle method, hot pressing coating method, hot pressing strengthening method, etc. These Most of the methods strengthen magnesium alloys of different specifications and uses according to the needs of use, but there are technical defects and disadvantages to varying degrees; for example, the method of casting doped ceramic particles, ceramic particles are unevenly distributed in the magnesium alloy matrix, easy Agglomeration occurs; casting defects such as porosity and shrinkage porosity will reduce the mechanical properties of the alloy; the alloy after particle strengthening has high wear resistance, but its plasticity and toughness will decrease

[0004] The high production cost and low plasticity and toughness of magnesium-based composites also limit the application of magnesium in industry.

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