TC2钛合金表面激光熔覆修复工艺研究  

Investigation of Laser Cladding on TC2 Titanium Component

作　　者：费群星[1] 白凤民[1] 张雁[1] 谭永生[1] 

机构地区：[1]高能束流加工技术国防科技重点实验室北京航空制造工程研究所,北京100024

出　　处：《应用激光》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

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.

关 键 词：激光熔覆 钛合金 显微组织 成分分布 显微硬度 

分 类 号：TG156.99[金属学及工艺—热处理] V261.3[金属学及工艺—金属学]