Magnesium alloy surface treatment method

Abstract

The invention discloses a magnesium alloy surface treatment method. After a traditional magnesium alloy thermal spraying method is adopted, laser remelting is performed on magnesium alloy so as to solve the problem that the magnesium alloy is not compact enough after thermal spraying is performed. The method comprises the steps of magnesium alloy surface pretreatment, magnesium alloy thermal spraying and laser remelting, wherein magnesium alloy surface pretreatment comprises surface purification treatment and sand blasting; Al2O3+TiO2 ceramic is adopted for magnesium alloy thermal spraying, oxygen-acetylene is used for reduction of flames, the oxygen pressure is 0.4-0.5 MPa, the spraying distance is 100-160 mm, and the coating thickness is 70-130 micrometers. The power of the laser is 1-3 KW, the spot diameter if 2-7 mm, and the scanning speed of laser is 5-30 mm / s. The flame spraying is performed on the magnesium alloy, laser remelting treatment is performed, the magnesium alloy surface structure is compact, and the hardness, wear resistance, corrosion resistance and vibration resistance of the magnesium alloy are obviously improved.

Description

technical field [0001] The invention relates to a magnesium alloy surface treatment method. Background technique [0002] Throughout the development history of magnesium research, the development and application of magnesium and magnesium alloys has not been smooth, and was at a standstill or even regressed for a time. Before the Second World War, the annual output of magnesium in the world was only tens of thousands of tons. During the Second World War, the output soared to 250,000 tons. After the World War, the annual output dropped rapidly to 10,000 tons. In the 1950s, when the Korean War broke out, the annual output of magnesium rose to 110,000 tons, but declined rapidly after the war. Before the 1960s, 80% to 90% of the magnesium in the world was used in the military industry and aviation industry. It was not until the 1960s that it expanded to the civilian industry, and the output of magnesium rose steadily, especially since the 1980s. In consideration of environment...

AI Technical Summary

Problems solved by technology

[0021] A method for surface treatment of magnesium alloys. After adopting the traditional thermal spraying method of magnesium alloys, laser remelting is performed on magnesium alloys to solve the shortcomings of magnesium alloys that are not dense enough after thermal spraying, including: surface pretreatment of magnesium alloys——magnesium alloys Thermal Spray - Laser Remelting