摘要
对激光熔覆修复表面带铬层的TC2钛合金构件进行了研究。结果表明,熔覆修复层的显微组织从界面往上依次由平面晶、细晶层和中部细小的树枝晶构成,主要元素Ni和Cr在截面内均匀分布,原有Cr层与熔覆层内的Cr元素呈连续状,构件修复区以外的铬层与基体的结合未受激光熔覆的影响。熔覆层具有较高的平均硬度,其中双层熔覆的修复层具有较小的过渡区,其参数组合是比较适宜的。
Laser cladding was used to repair the damaged surface of the chromium galvanized TC2 titanium component. The re suits show that from the interface to surface the microstructure of the cladded coating is composed of plane grains, tiny grains and fine dendritic grains. The two main compositions of Ni and Cr homogeneously distribute in the section. The undamaged chromium layer continuously connects with the cladded coating that indicates it had not affected by the cladding process. The coatings have high average microhardness. Among the three cladding modes, the double cladded coating has smaller transition area and is preferable for repairing the component.
出处
《应用激光》
CSCD
北大核心
2009年第5期379-382,392,共5页
Applied Laser
基金
高能束流加工技术国防科技重点实验室09基金资助项目
关键词
激光熔覆
钛合金
显微组织
成分分布
显微硬度
laser cladding
titanium
microstructure
composition distribution
microhardness
