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为了研究光纤激光在选区激光熔化直接成型316L不锈钢精密零件中的应用,采用扩束镜及f-θ透镜,将光纤激光在成型系统工作面上聚集成30μm～50μm左右的细微聚焦光束;通过分析离焦量、扫描速度、激光功率、扫描路径对比成型实验,获得了激光光斑直径、扫描速度、激光功率等工艺参量及扫描路径对成型精度的影响关系。结果表明,通过优化工艺参量及扫描路径,可成功成型壁厚达0.1mm的316L不锈钢精密零件。
In order to study the application of fiber laser in the selective laser melting direct forming 316L stainless steel precision parts, using the beam expander and f-θ lens, the fiber laser is concentrated on the working surface of the molding system into finely focused beam of about 30μm ~ 50μm; Defocusing amount, scanning speed, laser power and scanning path were compared to obtain the relationship between laser spot diameter, scanning speed, laser power and other parameters and the scanning path shape accuracy. The results show that by optimizing the process parameters and scanning path, the 316L stainless steel precision parts with the thickness of 0.1mm can be successfully formed.