送粉式激光熔覆裂纹机理的数值模拟  

Numerical Simulation on Crack Principle of Laser Cladding by Powder

作　　者：蒙宣伊 

机构地区：[1]湘电集团风能有限公司,湘潭411102

出　　处：《湖南工程学院学报（自然科学版）》2010年第1期39-42,共4页Journal of Hunan Institute of Engineering(Natural Science Edition)

摘　　要：在对送粉式激光熔覆应力产生机理进行深入分析的基础上,结合应力场数值模拟分析,结果表明熔覆层中心偏基体一侧是裂纹敏感区,该区域处于纵向拉伸、横向和厚向压缩的第三类主应变状态.Based on the analysis of the mechanism of stress in powder feeding laser cladding, and the analysis of numerical simulation of stress field, the crack mechanism of the cladding layer is proposed. The result shows that the center of cladding layer near the substrate is sensitive areas of the crack. This region in the third category of the main strain status is locatecl in longitudinal tensile strain, lateral and thickness-di- rection compression strain.

关 键 词：送粉式激光熔覆 数值模拟 应力场 

分 类 号：TG404[金属学及工艺—焊接]