华中科技大学学报（自然科学版）2018，Vol.46Issue(2)：51-55,5.DOI:10.13245/J.hust.180210
激光选区熔化成形S136模具钢的成形性能研究
Microstructure and property of S136 mould steel fabricated by selective laser melting
摘要
Abstract
S136 mould steel was manufactured by selective laser melting (SLM). The phase composition,microstructure, micro-hardness,wear properties and corrosion behavior were investigated.The results show that the samples built horizontally (top surface) contains large numbers of fine needle-like martensite,resulting in higher micro-hardness (688.20 HV3).Cracks tend to occur near and pendicular to the melting tracks.The lowest wear rate (5590μm3/(N·m)) are obtained in horizontal build samples.In the vertical build samples (side surface),lower micro-hardness (649.04 HV3) and higher wear rate (25840μm3/(N·m)) are obtained.The cracks are perpendicular to the building direction.In the FeCl3 solution,general corrosion occur for horizontal build samples while layer corrosion appear for vertical build samples.Results above show that SLM samples exhibit anisotropy in this study.The SLM technology is proved to manufacture mould insert with complex conformal cooling channel.Injection mould applications show that the use of the inserts can enhance the injection cooling efficiency by 25%,and reduce the injection production cycle by 20%.关键词
激光选区熔化/S136模具钢/显微硬度/摩擦磨损/腐蚀Key words
selective laser melting/S136 mould steel/micro-hardness/friction wear/corrosion分类
信息技术与安全科学引用本文复制引用
文世峰,吴雪良,周燕,魏青松..激光选区熔化成形S136模具钢的成形性能研究[J].华中科技大学学报（自然科学版）,2018,46(2):51-55,5.基金项目
国家自然科学基金资助项目(51605176,51375189) （51605176,51375189）
国家高技术研究发展计划资助项目(2015AA042501) （2015AA042501）
湖北省科技支撑计划资助项目(2014BAA017) （2014BAA017）
武汉市关键技术攻关计划资助项目(2015010202010088). （2015010202010088）
