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叙述了我们用一台连续可调(500～2000W)CO_2激光器对金属材料表面实现激光包覆和激光合金化的一些研究工作。 (一)激光包覆 将钴基和镍基合金粉末分别涂敷在60钢和纯铁的表面上进行激光包覆处理,控制激光器的能量和扫描速度,使包覆合金粉末熔化后自由散布在工件的表面上,并使基底材料表面薄层熔化与包覆合金形成金相结合。从显微组织结构照片可看出包覆层与基底熔接良好,显微组织在包层厚度范围内一致,合金层的硬度均大于1000Hv,包层的化学组成在包层厚度范围内保持一致不变,而基底材料对包层的稀释度小于5%。
Describes some of our work on laser cladding and laser alloying of metal surfaces with a continuously tunable (500-2000 W) CO 2 laser. (A) laser cladding Cobalt-based and nickel-based alloy powders were coated on the surface of 60 steel and pure iron laser cladding treatment, control the laser energy and scanning speed, so that the coated alloy powder is freely dispersed in the melt The surface of the workpiece, and the surface of the base material is melted and coated with the alloy to form a combination of gold. It can be seen from the pictures of the microstructure structure that the cladding layer and the substrate are welded well, the microstructure is uniform within the cladding thickness, the hardness of the alloy layer is greater than 1000 Hv, and the chemical composition of the cladding remains the same within the cladding thickness range Variable, while the base material of the cladding dilution of less than 5%.