摘要
利用316L不锈钢和Ni35两种合金粉末在定向凝固镍基高温合金基材上进行激光多层涂覆实验,并对涂层内部的凝固显微组织形成机理进行研究。结果表明在本文的实验条件下,利用316L不锈钢材料可以得到晶体取向良好的定向凝固涂覆层。而对于本身容易形成等轴晶的Ni35自熔合金,尽管实验在定向凝固的基材上进行,涂层中的凝固显微组织仍趋向于等轴晶形态。
316L stainless steel and Ni35 self-melt alloy were selected to perform laser multi-layer cladding experiments on the Ni-base superalloy directional solidification substrate. Mechanisms of microstructure formation were investigated. Results show that directional solidification cladding layers of 316L stainless steel with fine crystallography orientation under the processing parameters mentioned in this paper were obtained. While for the nickel-base self-melted alloy Ni35 which is not easy to acquire columnar dendrite tend to appearing equiaxed grains in the cladding layers under similar processing condition.
出处
《航空材料学报》
EI
CAS
CSCD
2004年第1期7-11,共5页
Journal of Aeronautical Materials
基金
863国家高技术研究发展计划(2001AA337020)
973国家重点基础研究发展规划专题(G2000067205 3)
