热累积效应对选区激光熔化钴铬合金组织和性能的影响  

Effect of Thermal Accumulation on Microstructure and Mechanical Properties of Selective Laser Melting Cobalt-Chromium Alloy

作　　者：邓煜华 黎振华[1] 姚碧波 滕宝仁 李颢 Deng Yuhua;Li Zhenhua;Yao Bibo;Teng Baoren;Li Hao(School of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650500,Yunnan,China;School of Mechanical and Electrical Engineering,Kunming University of Science and Technology,Kunming 650500,Yunnan,China)

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650500 [2]昆明理工大学机电工程学院,云南昆明650500

出　　处：《应用激光》2023年第1期32-44,共13页Applied Laser

基　　金：国家自然科学基金(51961017);云南省基础研究重点项目(202101AS070017);云南省重大专项(202103AN080001-002,202202AG050007-4)。

摘　　要：为研究选区激光熔化成形过程中热累积效应对0°和90°两种构建方向性能的影响,在ANSYS模拟熔池尺寸和热累积效应的基础上,通过试验分析0°和90°两种构建方向的熔池尺寸、致密度、XRD、微观组织和力学性能的差异。结果表明,在相同体能量密度条件下,垂直构建成形件的热累积效应要高于水平构建成形件,使其熔池尺寸和γ相含量高于水平构建成形,进而使两种构建方向成形件致密度和力学性能产生差异;同时,由于热累积效应的影响,垂直构建成形件的γ相含量随成形高度的变化而变化。In order to investigate the thermal accumulation effect on the properties of two build directions of 0°and 90°during the selective laser melting.Based on the ANSYS simulation of molten pool size and thermal accumulation effect,the mechanical properties of the two build-formed parts were explored experimentally,and the differences in melt pool size,density,XRD,microstructure and mechanical properties between 0°and 90°build directions were analyzed.Results show that the thermal accumulation of the vertical build-formed parts is higher than that of the horizontal build-formed parts under the same bulk energy density,which results in higher melt pool size andγ-phase content than that of the horizontal build-formed parts,and thus the difference in the densities and mechanical properties between the two build-formed parts.Due to the effect of heat accumulation,theγ-phase content of different forming parts of the vertical build forming parts changes.

关 键 词：选区激光熔化 钴铬合金 ANSYS有限元模拟 热累积 力学性能 

分 类 号：TN249[电子电信—物理电子学]