粉末粒径对激光选区熔化成形S136模具钢的磨损与抗腐蚀性能的影响  

Effect of Powder Particle Size on Wear and Corrosion Resistance of S136 Mould Steels Fabricated by Selective Laser Melting

作　　者：周燕 段隆臣[1] 吴雪良[2] 文世峰 魏青松[2] Zhou Yan1,2, Duan Longchen1, Wu Xueliang2, Wen Shifeng2, Wei Qingsong2(1Faculty of Engineering, China University of Geosciences, Wuhan, Hubei 430074, China ; 2 State Key Laboratory of Materials Processing and Die ＆ Mould Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China)

机构地区：[1]中国地质大学工程学院,湖北武汉430074 [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：《激光与光电子学进展》2018年第10期199-205,共7页Laser & Optoelectronics Progress

基　　金：国家高技术研究发展计划(2015AA042501);国家自然科学基金(51605176);佛山市重大科技项目(2016AG101253)

摘　　要：采用激光选区熔化技术成形了不同粒径的S136模具钢,研究了粉末粒径对成形件相组成、组织、磨损性能和抗腐蚀性能的影响。结果表明,粉末平均粒径为22.8μm的成形件基本无孔隙,摩擦系数和磨损率较小,耐腐蚀性能最佳,腐蚀失重为31.51×10^(-4) g·mm^(-2)。粉末平均粒径过小时成形件易产生裂纹,而过大时易产生孔隙。The S136 mould steels with different particle sizes are fabricated by the selective laser melting （SLM） technique and the effects of particle size on phase compositions, microstructures, wear and corrosion resistance performances are studied. The results show that the forming parts with an average particle size of 22.8 μm have nearly no micro-pores, and their friction coefficient and wear rate are relatively small, but the corrosion resistance performance is the best and the corrosion weight-loss is 31.51 × 10-4 g. mm-2 . If the average particle size is too small, there occur more cracks in the forming parts, however there occur more micro-pores when the average particle size is too large.

关 键 词：激光技术 激光选区熔化 粒径 S136 摩擦磨损 腐蚀 

分 类 号：TN249[电子电信—物理电子学]