大功率半导体激光熔覆高速钢研究

使用2kW半导体激光在工具钢表面熔覆高速钢粉末。在同轴送粉的粉末汇聚点与激光的聚焦点可获得无裂纹的熔覆层。随着激光功率的增加,熔覆层厚度和粉末利用率增加,同时基体对熔覆层的稀释率下降。获得的熔覆层的硬度达到800Hv0.3,基体硬度200Hv0.3,表明大功率半导体激光在表面熔覆领域具有很好的应用前景。

Cladding of high speed steel by high power diode laser

One 2 kW high power diode laser was used for cladding of high speed steel powder on the substrate of a tool steel. A crackfree cladding layer could be obtained along the interacted zone of the focused powder stream and focused laser beam. With the increasing of laser power, the thickness of cladding and availability of powder were increased, and the dilution of substrate to cladding layer was decreased. The hardness of the cladding layer was up to 800 Hv0.3 and the hardness of the substrate was up to 200 Hv0.3. The result demonstrates that high power diode laser is very competitive for future application in surface cladding