镀铬Inconel690合金管激光熔凝层中Cr的扩散行为  

Diffusion behavior of chromium in the laser remolten layer of electroplated chromium coating on Inconel 690 alloy tube

作　　者：邓化凌[1] 陈清伟 杨胶溪[3] 

机构地区：[1]山东电力研究院,山东济南250002 [2]山东里彦发电有限公司,山东济宁273517 [3]北京工业大学激光工程研究院,北京100124

出　　处：《金属热处理》2012年第11期68-70,共3页Heat Treatment of Metals

基　　金：山东电力集团公司重点科技攻关项目(2008A-20)

摘　　要：采用电镀铬+激光辐照表面改性方法对Inconel 690合金管进行表面处理,获得激光熔凝层。用SEM观察镀铬层及熔凝层的微观形貌,用EDX方法研究了Cr元素在熔凝层中的扩散行为。结果表明,在较浅的熔凝层中,从管壁的外缘至管的内部,Cr浓度梯度较大,呈逐渐降低趋势;随熔凝层深度的增加,Cr扩散深度增加,分布趋于均匀。The laser remolten layer was made on the Inconel 690 alloy tubes by using electroplated chromium and laser irradiation.Through the scanning electron microscope（SEM） and energy dispersive X-Ray spectroscopy（EDX）,the microstructure of the electroplated coating and the laser remolten layer was investigated,as well as the diffusion behavior of chromium in the layer.The results show that in the thin laser remolten layer,from the outer surface to the interior of the tube,the chromium concentration gradient is larger,and the concentration reduces gradually.With the laser remolten layer depth increases,the diffusion depth of chromium increases and element distribution trends uniform.

关 键 词：Inconel690合金 镀铬层 激光熔凝 扩散行为 

分 类 号：TG174.44[金属学及工艺—金属表面处理] TG156.99[金属学及工艺—金属学]