工艺参数对激光快速成型316L不锈钢组织性能的影响

Influence of Processing Parameter on the Microstructure and Properties of the 316L SS Fabricated by Laser Direct Deposition

采用激光快速成型技术制备了316L不锈钢零件,研究了激光功率对激光快速成型不锈钢零件组织、性能的影响。研究结果表明,激光功率≤900W条件下,所成型的不锈钢薄壁墙的组织为枝晶组织,当激光功率升高到1150W时,枝晶组织变得更短。机械性能测试结果显示,在各激光功率下制备的不锈钢薄壁墙的机械性能均可满足实际使用要求。

This paper is focused on the research of the 316 L stainless steel prepared by laser direct deposition, especially on the influence of laser power on the microstructure and properties of the parts by laser direct deposition. The results show that the obtained microstructure of the thin wall of stainless steel is composed of dendrites with the condition of the laser power less than 900 W, however, when the laser power reached to 1150 W, the dendrites become shorter. The mechanical property testing indicates that the as-formed 316L stainless steel under different laser power can meet the need to actual utility.