激光选区熔化成形316L/IN718混合粉末工艺研究  

Study on Laser-Selective Melting Forming Process of 316L/IN718 Mixed Powder

作　　者：杨炫 韩保红 赫万恒 张敦絮 YANG Xuan;HAN Bao-hong;HE Wan-heng;ZHANG Dun-xu(Department of Vehicle and Electrical Engineering,Shijiazhuang Campus,Army Engineering University,Shijiazhuang 050000,China)

机构地区：[1]陆军工程大学石家庄校区车辆与电力工程系,河北石家庄050000

出　　处：《材料保护》2023年第5期133-138,147,共7页Materials Protection

摘　　要：为获得高致密度的316L/IN718混合金属粉末零件,基于激光选区熔化(SLM)技术,分别选取不同的激光扫描速度和扫描间距,通过单熔道实验、单层实验以及块体实验探究了316L/IN718混合金属粉末的成形工艺。实验结果表明:单熔道实验当0.54 J/mm≤激光线能量密度(L)≤0.76 J/mm时,熔道成形效果较好。当激光功率P=200 W、扫描速度v=280 mm/s、扫描间距=0.12 mm时,可获得致密度为99.99%的块体,拟合得到激光体能量密度-相对致密度关系,该工艺研究具有应用和推广价值,为实现成形梯度功能材料提供了重要的实验数据和技术支撑。In order to obtain high-density 316L/IN718 mixed metal powder parts,the forming process of 316L/IN718 mixed metal powder was investigated by single fusion channel experiments,single layer experiments and block experiments,based on laser-selective melting(SLM)technology with different laser scanning speeds and scanning pitchs,respectively.Results showed that when 0.54 J/mm≤laser line energy density(L)≤0.76 J/mm in a single melt experiment,the effect of melt forming is relatively good.When the laser power(P)=200 W,scan-ning speed(v)=280 mm/s,and scanning pitch=0.12 mm,the blocks with a density of 99.99%could be obtained.Besides,the laser ener-gy density-relative density relationship was obtained by fitting.The process research presented application and promotion value,providing im-portant experimental data and technical support for achieving forming gradient functional materials.

关 键 词：激光选区熔化 316/IN718梯度材料 工艺参数 致密度 

分 类 号：TB331[一般工业技术—材料科学与工程]