激光功率密度对SLM成形TC4磨损性能的影响  

Effect of laser power density on wear resistance of TC4 alloy manufactured by SLM

作　　者：王凯[1] 焦向东 朱加雷[2] 李京洋[2] 杜士瑄 WANG Kai;JIAO Xiangdong;ZHU Jialei;LI Jingyang;DU Shixuan(Beijing University of Chemical Technology,Beijing,100029,China;Beijing Institute of Petrochemical Technology,Beijing,102617,China)

机构地区：[1]北京化工大学,北京100029 [2]北京石油化工学院,北京102617

出　　处：《焊接学报》2020年第5期61-64,I0004,共5页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(51675052)。

摘　　要：采用激光选区熔化技术(selective laser melting,SLM)制备TC4磨损试样,探究不同激光功率密度对SLM试样磨损性能的影响.采用MMW-1A万能摩擦磨损试验机测试不同功率密度下SLM试样的耐磨损性能,通过X射线衍射仪(XRD),X射线能谱仪(EDS)和扫描型电子显微镜(SEM)表征SLM试样的成分和结构,并用显微硬度仪测试硬度.结果表明,SLM试样比精铸TC4磨损过程更稳定,提高激光功率密度有利于激光细晶强化作用,提高了材料的抗磨损性能.In this essay,TC4 wear samples were prepared by selective laser melting(SLM)to study the effects of different laser power densities on the wear properties of SLM samples.The wear resistance of SLM specimens at different power densities was tested by MMW-1 A universal wear tester.The composition and structure of different TC4 samples by SLM were analyzed by X-ray diffraction,energy dispersion spectrum and scanning electron microscopy,and the hardness was tested by microhardness tester.The results show that SLM specimens are more stable than the casting.Increasing the laser power density increases the fine grain strengthening effect of the laser,which is beneficial to improve the wear resistance of the material.

关 键 词：激光选区熔化 激光功率密度 细晶强化 抗磨损性能 

分 类 号：TG456.7[金属学及工艺—焊接]