铬对激光快速成型试件组织和力学性能的影响  

Effect of Chromium on Microstructure and Mechanical Properties of Laser Rapid Prototyping Specimens

作　　者：闫梦达 邱长军[1] 陈伟[1] 

机构地区：[1]南华大学机械工程学院,湖南衡阳421001

出　　处：《装备制造技术》2017年第10期64-65,83,共3页Equipment Manufacturing Technology

基　　金：国家自然科学基金项目(51474130);湖南省高校重点实验室(湘财教指[2014]85号);湖南省重点学科建设项目(湘教发[2011]76号);湖南省高校科技创新团队支持计划(湘教通[2012]318号)

摘　　要：利用激光表面增材制造技术在基材上熔覆三种铬含量不同的粉末,分别为5.12%、12.3%、17.2%,通过X射线衍射法测量各熔覆层中残余奥氏体(AR)量,研究其力学性能。试验结果表明,Cr含量是通过影响熔覆层AR量来影响熔覆层的硬度和抗拉强度,随着Cr含量增加,熔覆层硬度和抗拉强度逐渐下降。Using laser surface additive manufacturing technology,three chromium powders with different contents were deposited on the substrate,respectively,5.12%,12.3% and 17.2%. The retained austenite（AR） in the cladding layers was measured by X ray diffraction method. The test results show that the content of Cr affects the hardness and tensile strength of the cladding layer by affecting the amount of ARin the cladding layer. With the increase of Cr content,the hardness and tensile strength of the cladding layer decrease gradually.

关 键 词：铬 激光快速成型 硬度 抗拉强度 

分 类 号：TG456.7[金属学及工艺—焊接]