河北工业科技2018，Vol.35Issue(4)：278-282,5.DOI:10.7535/hbgykj.2018yx04009
AZ91D镁合金激光熔化成型工艺参数优化
Process parameters optimization of selective laser melting molding of AZ91D magnesium alloy
摘要
Abstract
The AZ91D magnesium alloy powder is used as raw material to optimize the selective laser melting molding process. First,orthogonal test and range analysis method are used to study the influence rule of three key process parameters,including laser power,scanning speed and scanning distance,on the mechanical properties of the workpiece.Then the specimen with optimized parameters is treated with solution treatment,and the X ray diffraction and metallographic analyses are used to ana-lyze the microstructure.The final preferred process parameters for laser melting are as follows:laser power is 180 W,scanning speed is 500 mm/s and scanning interval is 60 μm.The properties of the specimens fabricated by the optimized parameters are as follows:the density is 99.8％,the yielding strength is 200 MPa,the tensile strength is 285 MPa,elongation is 3.2％ and vickers hardness is 135 Hv.The optimized solid solution heat treatment parameter for the specimen is 420 ℃ × 12 h.It can greatly increase the elongation of the specimen to 5.9％.The process is of great significance in the field of aerospace and other high lightweight requirements.关键词
特种加工工艺/选区激光熔化成型/AZ91D镁合金/致密度/力学性能/热处理Key words
non-traditional machining/selective laser melting molding/AZ91D magnesium powder/density/mechanical prop-erties/heat treatment分类
信息技术与安全科学引用本文复制引用
岳彦芳,马方正,李建辉,王帅鹏..AZ91D镁合金激光熔化成型工艺参数优化[J].河北工业科技,2018,35(4):278-282,5.基金项目
河北省自然科学基金京津冀合作专项(E2017208128) （E2017208128）
