激光选区熔化0Cr16Ni5Mo1马氏体不锈钢的成形工艺及显微组织研究

Study on Forming Process and Microstructure of 0Cr16Ni5Mo1 Martensitic Stainless Steel Fabricated by Selective Laser Melting

通过激光选区熔化技术制备了0Cr16Ni5Mo1马氏体不锈钢试样,研究了激光扫描速度和激光功率对成形试样致密度及微观组织的影响。结果表明:0Cr16Ni5Mo1粉末SLM优化工艺参数组合为激光功率214 W、扫描速度728 mm/s,试样的致密度最高。在较优工艺参数下,试样组织内部为板条状马氏体;工艺参数不合理时,试样内部δ铁素体较多。

0 Cr16 Ni5 Mo1 martensitic stainless steel samples were prepared by selective laser melting(SLM) technology.The effects of different laser scanning speeds and laser power on the density and microstructure of the formed samples were investigated. The results show that, the samples manufactured at optimized parameters(the laser power is 214 W, scanning speed is 728 mm/s) exhibit the highest density. The microstructure of the samples fabricated by optimized parameters is mainly composed of lath martensite. When the process parameters are unreasonable, there are more δ-ferrite in the sample.