选区激光熔化(SLM)技术可用于金属粉末快速制作冶金实体,成型件致密性是SLM工艺研究的重点,也是制备金属制件的基本要求。选用铁镍系金属粉末,在不同的激光功率、扫描速度和铺粉厚度等工艺参数条件下,采用单道扫描和多层单道扫描等方式进行实验,并利用扫描电镜对不同工艺所制备的试样进行微观形貌研究和致密性分析,确定了优化的工艺参数匹配并制备出块体试样,致密度达80%以上。 Selective laser melting (SLM) technology can be used to make metallurgical solid metal powder quickly. The compactness of molded parts is the key point of SLM process research and the basic requirement of preparing metal parts. Iron-nickel series metal powder was chosen to carry out experiments under different process parameters of laser power, scanning speed and powder thickness, using single-channel scanning and multi-layer single-channel scanning, and using scanning electron microscopy The microstructure and compactness of the samples were studied, and the optimized process parameters were matched and the bulk samples were prepared. The density reached more than 80%.