激光熔覆Stellite6/WC的组织与性能研究  

Microstructures and Properties of Laser Cladding Stellite6/WC

作　　者：熊云[1] 王勇[1] 张开峰[2] 张跟庆[3] 

机构地区：[1]中国石油大学(华东)机电工程学院,东营257061 [2]胜利油田东辛采油厂,东营257094 [3]胜利油田井下作业二公司,东营257051

出　　处：《中国表面工程》2008年第1期37-40,共4页China Surface Engineering

基　　金：中国石油大学(华东)博士科研基金目(编号:Y050322)

摘　　要：利用5kW横流CO2激光器在1Cr18Ni9Ti不锈钢表面熔覆Stellite6/WC,选用适当的工艺参数,在基体表面可获得均匀的熔覆层组织。采用光学显微镜、硬度仪和M398腐蚀电化学综合测试系统对熔覆层的组织结构及电化学腐蚀性能进行了系统研究。结果表明,熔覆层的表面硬度最高达到57HRC,约为基体的2～3倍。与基体相比,熔覆层的电化学腐蚀性能也有了很大的提高。通过在熔覆层粉末中加入一定量的金属还原剂铝,并在熔覆过程中进行氩气保护可以很好的解决了熔覆层的气孔问题。A5 kW CO2 laser apparatus was used for cladding Stellite6/WC powder on 1Cr18Ni9Ti stainless steel surface. The appropriate selection of the process parameters could obtain defect-free fine micro-structures. The micro-structures were examined by optical microscope. The results indicated that the surface hardness of cladding coating can reach up to 57HRC, which was about 3 times that of the matrix. The corrosion resistance of laser cladding layer was higher than the matrix. When adding appropriate amount of Al with low melting point into the Stellite6/WC powder, the porosity disappeared under argon protecting.

关 键 词：激光熔覆 Stellite6/WC 组织和性能 

分 类 号：TG115[金属学及工艺—物理冶金] O532.25[金属学及工艺—金属学]