A kind of preparation method of light metal surface compound coating
A technology of light metals and compounds, applied in the direction of heating inorganic powder coating, etc., to achieve the effect of improving performance, reducing forming temperature, and promoting forming
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Embodiment 1
[0023] 1) Grinding and polishing the metal aluminum surface, and then ultrasonic cleaning in alcohol;
[0024] 2) The surface of the metal aluminum is subjected to laser melting treatment, the laser power is 1KW, the scanning speed is 5mm / s, the diameter of the spot is 2mm, the overlap rate is 20%, and the surface grains are refined;
[0025] 3) Pre-place 10nm metal nickel powder on the surface of metal aluminum after laser melting treatment;
[0026] 4) Use 40μm aluminum foil as the absorbing layer and the plastic coating layer, and cover the metal aluminum pre-prepared with nickel powder as a whole. While acting as the laser absorbing layer, the aluminum foil plays the role of restraining the metal powder and avoiding the impact and splash of the metal powder and fall off;
[0027] 5) Fix the metal aluminum coated with pre-coated nickel powder on the heating workbench, use high-temperature resistant glass as the constrained layer, heat it to 400°C and perform laser peening ...
Embodiment 2
[0030] 1) Grinding and polishing the surface of the AZ31 magnesium alloy, and then ultrasonic cleaning in alcohol;
[0031] 2) The surface of the magnesium alloy is subjected to laser melting treatment, the laser power is 2KW, the scanning speed is 15mm / s, the spot diameter is 3mm, and the overlap rate is 30%, so as to refine the surface grains;
[0032] 3) Pre-place 10 μm metal aluminum powder on the surface of the aluminum alloy after laser melting treatment;
[0033] 4) Use 20μm aluminum foil as the absorbing layer and the plastic coating layer, and wrap the magnesium alloy with the pre-prepared aluminum powder as a whole. While the aluminum foil serves as the laser absorbing layer, it also plays a role in restraining the metal powder and avoiding the impact and splash of the metal powder and fall off;
[0034] 5) Fix the pre-coated magnesium alloy with aluminum powder on the heating workbench, use high-temperature resistant glass as the constrained layer, heat it to 500°C...
Embodiment 3
[0037] 1) Grind and polish the ZL101 aluminum alloy surface, and then perform ultrasonic cleaning in alcohol;
[0038]2) The surface of the aluminum alloy is subjected to laser melting treatment, the laser power is 5KW, the scanning speed is 50mm / s, the spot diameter is 5mm, the overlapping rate is 50%, and the surface grains are refined;
[0039] 3) Pre-place 100 μm metal zinc powder on the surface of aluminum alloy after laser melting treatment;
[0040] 4) Use 30μm aluminum foil as the absorbing layer and the plastic coating layer, and wrap the aluminum alloy with zinc powder in place as a whole. While serving as the laser absorbing layer, the aluminum foil plays a role in restraining the metal powder and avoiding the impact and splash of the metal powder and fall off;
[0041] 5) Fix the coated aluminum alloy with pre-coated zinc powder on the heating workbench, use high-temperature resistant glass as the constraining layer, heat it to 600°C and perform laser peening with...
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