粉末压片冷等静压处理对高温合金NiCoCrAlY熔覆涂层结合界面的影响  

Effect of Squashing by Cold Isostatic Pressing on Bonding Interface between NiCoCrAlY Coating and High Temperature Alloy

作　　者：许瑞华[1,2] 黎向锋[1,2] 左敦稳[1] 王宏宇[3] 柳振平[1] 李建忠[1] 

机构地区：[1]南京航空航天大学机电学院,江苏南京210016 [2]江苏省精密与微细制造技术重点实验室,江苏南京2100163 [3]江苏大学机械工程学院,江苏镇江212013

出　　处：《激光与光电子学进展》2013年第11期125-129,共5页Laser & Optoelectronics Progress

基　　金：航空科学基金(2010ZE52056);江苏省精密与微细制造技术重点实验室基金;江苏省自然科学基金(BK2011479)

摘　　要：采用激光熔覆技术基于压片预置式法在高温合金基体上制备NiCoCrAlY熔覆涂层,分析讨论粉末压片冷等静压处理对其熔覆涂层结合界面的影响。研究表明,粉末压片冷等静压处理后熔覆试样的宏观形貌更加完整连续,同时能够改善熔覆涂层与基体结合界面间的裂纹现象。对其机理进一步分析可知:冷等静压处理后的粉末压片的厚度变薄,致密度增加,熔覆所需要的激光比能增加,从而提高了熔覆层结合界面的质量。Based on the method of squashing presetting on the high temperature alloy to prepare NiCoCrAIY coating by laser cladding, the influence of squashing treated by cold isostatic pressing on the bonding interface is discussed. The research shows that macroscopic morphology of layers with pretreatment is complete and continuous and the phenomena of cracks in the coating interface are eliminated or reduced. With further study of mechanism, it is found that the thickness of the squashing decreased while the density and laser specific energy required for laser cladding increase, which are beneficial to the quality of interracial morphologies of laser cladding.

关 键 词：激光技术 激光熔覆 冷等静压 高温合金 结合界面 

分 类 号：TG174.4[金属学及工艺—金属表面处理]