福建师范大学学报（自然科学版）2017，Vol.33Issue(2)：38-43,6.DOI:10.12046/j.issn.1000-5277.2017.02.006
40Cr基体温度对激光熔覆Cr18Ni8Mo2Si的影响
Effects of the Substrate Temperature on Microstructure and Properties of Laser Cladding Cr18Ni8Mo2Si on 40Cr
摘要
Abstract
Orthogonal experimental arrangements of laser cladding Cr18Ni8Mo2Si on the 40Cr substrate were conducted to investigate the effects of four parameters,preheating temperature,laser power,scanning speed and beam diameter on the microstructure and properties of claddings.The results showed that the residual stress of laser cladded Crl8Ni8Mo2Si decreases as the preheating temperature increases.The minimum residual stress was achieved at the parameter combination:the preheating temperature of 400 ℃,1 200 W laser power,scanning speed of 4 mm · s-1,and a 3 mm beam diameter.Additionally,as the preheating temperature increases,the defects in the cladding microstructure were reduced and better bonding performance were obtained.The microhardness of the cladding layer was also improved as the preheating temperature rises.The results provide a theoretical basis for laser cladding of die cutting machine tool.关键词
激光熔覆/基体温度/残余应力/显微组织/显微硬度Key words
laser cladding/preheat temperature/residual stress/microstructure/icro hardness分类
矿业与冶金引用本文复制引用
许明三,江吉彬,张宁,陈昌荣,钟文彬..40Cr基体温度对激光熔覆Cr18Ni8Mo2Si的影响[J].福建师范大学学报（自然科学版）,2017,33(2):38-43,6.基金项目
国家自然科学基金资助项目(51575110、51305079) （51575110、51305079）
福建省自然科学基金资助项目(2015J01628、2015J01181、2016J01202) （2015J01628、2015J01181、2016J01202）
福建省教育厅产学研专项(JA14211) （JA14211）
福建省经信委2015年省级企业技术改造专项 （）
福建省科技计划资助项目(2017H0002) （2017H0002）
