Using laser cladding technology to prepare alloy coating on the surface of the slide rail is an effective method to improve the performance of the slide rail, especially for improving the wear resistance, corrosion resistance and heat resistance. The following are the specific steps and precautions of this technology:
First, laser cladding process:
1, matrix cleaning: first clean the surface of the slide rail, remove oil, rust and other impurities, to ensure a good combination of the cladding layer and the matrix.
2, material selection: according to the working environment and performance requirements of the slide, carefully select the appropriate alloy powder, common nickel base alloy, cobalt base alloy, iron base alloy, etc., can also include tungsten carbide and other hard compounds to enhance hardness and wear resistance.
3, laser parameter Settings: adjust the laser power, scanning speed, lap rate and other parameters to ensure uniform coating, no porosity, no cracks.
4. Cladding operation: The laser beam is used to accurately melt the alloy powder and fuse it with the surface of the slide rail to form a uniform and dense alloy layer.
5, follow-up treatment: the slide after cladding may require further heat treatment, such as annealing, to optimize the microstructure and improve the coating performance.
6, surface finishing: then carry out the necessary grinding, grinding and other processes to obtain a smooth and flat surface to ensure that the accuracy meets the standard.
Ii. Precautions:
1, powder size: select the appropriate particle size of powder, too fine may affect the stability of powder delivery, too large may lead to instability of the molten pool, resulting in defects.
2, laser energy density: should be properly adjusted, too high will lead to overheating of the matrix, too low can not completely melt the alloy powder, affecting the binding force.
3, cooling rate: fast cooling is conducive to the formation of martensite and other hard phases, but too fast will increase the internal stress, may lead to cracks.
Finished product advantages:
4, improve wear resistance: the alloy layer has higher hardness and strength than the matrix, significantly prolonging the service life of the slide.
5, strong corrosion resistance: the addition of special alloys improves the corrosion resistance, especially in seawater, acid and alkali and other corrosive environment has a good performance.
6, thermal stability: good heat resistance, can be stable under high temperature conditions, suitable for heat treatment, casting and other occasions.
7, high bonding strength: through metallurgical bonding, to ensure that the coating and the matrix firmly fit, will not easily peel off.
The alloy coating prepared by laser cladding greatly enhances the overall performance of the slide rail, making it better able to cope with complex conditions, reduce maintenance times, reduce operating costs, and bring real benefits to various industries.