选区激光熔化S136模具钢粉末成形工艺研究  

Study on Forming Technique of Selective Laser Melting S136 Die Steel

作　　者：朱学超[1] 魏青松[2] 孙春华[1] ZHU Xuechao;WEI Qingsong;SUN Chunhua(School of Mechano-electronic Engineering,Suzhou Vocational University,Suzhou 215104,China;State Key Laboratory of Material Processing and Die&Mould Technology,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]苏州市职业大学机电工程学院,江苏苏州215104 [2]华中科技大学材料成形与模具技术国家重点实验室,湖北武汉430074

出　　处：《苏州市职业大学学报》2018年第3期22-26,共5页Journal of Suzhou Vocational University

基　　金：国家自然科学基金资助项目(51605176);国家自然科学基金资助项目(51375189);国家高技术研究发展计划资助项目(2015AA042501);国家科技支撑计划项目(2012BAF08B03)

摘　　要：选区激光熔化(SLM)技术成形件尺寸精度高、成形面粗糙度低,能够实现由粉末到零件的自由、快速制造,特别适合成形具有复杂结构的随形冷却水路的模具。利用选区激光熔化(SLM)技术对S136模具钢粉末进行不同激光功率和扫描速度组合下的单道扫描试验,分析归类了熔道形貌特征,并对熔道宽度的成形稳定度下最优工艺、激光功率和扫描速度对熔道宽度的影响规律进行研究,从中分析较优工艺参数组合下熔道形貌特征产生的原因。The parts formed by laser selective melting(SLM)enjoy high precision and low roughness of forming surface.It can make free and rapid manufacturing from powder to parts.SLM is especially suitable for forming mold with complicated cooling water structure.The single channel scanning test of S136 die steel powder with SLM technology is used to carry out under different laser powers and scanning speeds.The morphology characteristics of the melt channel are classified and the optimal process is studied under the forming stability of the width of the melt channel.The influence of laser power and scanning speed on the width of the melt channel is researched.The reasons for the appearance of the weld shape characteristics under the combination of the superior process parameters are analyzed.

关 键 词：选区激光熔化 熔道形貌特征 成形工艺窗口 熔道宽度 

分 类 号：TN249[电子电信—物理电子学]