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Method of preparing thin crystal composite layer on magnesium alloy surface

A magnesium alloy and composite layer technology, applied in metal processing equipment, manufacturing tools, welding equipment, etc., can solve the problems of magnesium alloy surface oxidation, high energy consumption, complex process, etc., to refine grains and improve wear resistance. , the effect of simple process

Inactive Publication Date: 2007-10-24
LANZHOU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

The disadvantage of this technology is that the energy consumption is large, the process is relatively complicated, and it is easy to oxidize the surface of the magnesium alloy.

Method used

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  • Method of preparing thin crystal composite layer on magnesium alloy surface
  • Method of preparing thin crystal composite layer on magnesium alloy surface

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Embodiment Construction

[0007] The invention relates to a method for preparing a fine-grained composite layer on the surface of a magnesium alloy. A magnesium alloy formed by casting or a semi-solid formed magnesium alloy is used. First, the surface of the magnesium alloy is polished, and grooves are opened on the surface of the magnesium alloy. The grooves are filled with powdered Al+SiC, and then friction stir processing is performed to form a fine-grained composite structure on the surface of the magnesium alloy.

[0008] The AZ91D magnesium alloy obtained by metal mold casting is firstly polished on the surface of the magnesium alloy, and a friction stirring head with a shaft shoulder diameter of 18 mm, a stirring pin diameter of 6 mm, and a height of 4 mm is selected. Dig 4.2mm deep, 1mm wide, and 5mm-spaced grooves on the surface of the magnesium alloy, and evenly fill them with Al+SiC powder. Install it on the friction stir welding machine and process it under specific welding parameters. The ...

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Abstract

The invention discloses a preparing method of composite fine-grained layer on the surface of magnesium alloy, which is characterized by the following: adopting casting shaping magnesium alloy or semi-solid pattern as raw material; sanding the surface of magnesium alloy; opening groove on the surface of magnesium alloy; filling powder-shaped Al+SiC in the groove; stirring the surface; forming the fine-grained layer with high antirusting and anti-abrasion resistance.

Description

technical field [0001] The invention belongs to the technical field of surface modification, and relates to surface refinement and improvement of surface corrosion resistance and wear resistance. Background technique [0002] The invention patent "SiC+Al surfacing method on magnesium alloy surface" (application number 200410089271.5) discloses a SiC+Al surfacing method on magnesium alloy surface. The surface of the magnesium alloy workpiece is polished with sandpaper to remove oxides, and then rinsed with alcohol. Dry in the air; mix SiC and Al powder according to particle size and volume ratio SiC / Al, add binder, stir evenly, and make coating material; apply the prepared coating material evenly on the magnesium alloy workpiece surface, and then dry the coated magnesium alloy workpiece; carry out inert gas shielded tungsten arc surfacing remelting treatment on the surface of the coated magnesium alloy workpiece, adjust the welding current, welding speed and welding torch ang...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/02B23K20/12
Inventor 陈体军朱战民郝远马颖
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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