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Method of preparing thin crystal layer on magnesium alloy surface

A magnesium alloy and fine-grain technology, which is applied in the field of surface modification, can solve the problems of high energy consumption, surface oxidation of magnesium alloys, complicated processes, etc., and achieves the effects of simple process, grain refinement and convenient operation.

Inactive Publication Date: 2007-10-24
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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

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Embodiment Construction

[0007] The AZ91D magnesium alloy obtained by metal mold casting is firstly polished on the surface of the magnesium alloy, and then directly mounted on the friction stir welding machine to process the surface of the magnesium alloy. The speed of the friction stir welding machine is 250-500 rpm The speed is 160-450mm / second. A layer of fine-grained structure with fine grains, uniform and dense structure, and no casting defects is obtained. Figure 1 shows the surface electron microscope microstructure of the magnesium alloy before friction stir processing, the structure is extremely inhomogeneous, eutectic Mg 17 al 12 Discontinuous network or thin rod distribution, extremely coarse grains. As shown in Figure 2, after friction stir processing, the eutectic Mg 17 al 12 disappeared completely, and the crystal grains became very fine.

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Abstract

The invention discloses a preparing method of fine-grained layer on the surface of magnesium alloy, which is characterized by the following: adopting casting shaping magnesium alloy as raw material; sanding the surface of magnesium alloy; 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. 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 angle, select the shield...

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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