选择性激光烧结304L不锈钢粉末的试验研究  

Experimental Study on Selective Laser Sintering of 304L Stainless Steel Powder

作　　者：季业益[1] 陆宝山[1] 关集俱 JI Yeyi;LU Baoshan;GUAN Jiju(Suzhou Vocational Institute of Industrial Technology,Suzhou 215104,China)

机构地区：[1]苏州工业职业技术学院,江苏苏州215104

出　　处：《热加工工艺》2022年第23期118-123,共6页Hot Working Technology

基　　金：国家自然科学基金青年基金项目(51805345);江苏省自然科学基金青年基金项目(BK20170373);江苏高校“青蓝工程”资助项目(2019);苏州市重点实验室资助项目(SZS201815)。

摘　　要：对304L不锈钢粉末进行选择性激光烧结成形,观察激光与304L不锈钢粉末间的交互作用,以此作为单层烧结参数的选择依据;同时测量粉末孔隙率找出最佳单层烧结参数,随后进行多层堆叠烧结试验,通过分析显微组织以及层与层间的结合程度,确定最佳的堆叠烧结参数;最后对烧结试样进行金相观察、硬度与拉伸试验。结果表明,烧结后的试样显微组织中有完整的粉末颗粒,部分熔融粉末包覆未熔融粉末;不同扫描路径的烧结试样硬度均比原材高,但其抗拉强度要远低于原材,S型路径扫描比螺旋型路径扫描的烧结试样抗拉强度高。The selective laser sintering of 304L stainless steel powder was carried out to observe the interaction between laser and 304L stainless steel powder, which was taken as the selection basis of the single-layer sintering parameters.Meanwhile, the porosity of spcimens was tested to find the best single-layer sintering parameters, and then the multi-layer stacking sintering test was carried out. The optimal stacking sintering parameters were determined by analyzing the microstructure and the bonding degree between layers. Finally, the sintered specimens were tested by metallography observation, hardness and tensile tests. The results show that there are complete powder particles in the microstructure of the sintered specimen, and part of the unmelted powder is coated with melted powder;the sintered specimens with different scanning paths have higher hardness than the raw material, but the tensile strength is far lower than that of the raw material;the S-path scanning specimens have higher tensile strength than the spiral path scanning specimens.

关 键 词：激光烧结 304L不锈钢粉末 烧结路径 

分 类 号：TG456.7[金属学及工艺—焊接] TG455