(昆明理工大学材料系，基础部，昆明 650093)
摘 要: 利用激光表面重熔和激光熔敷镍基合金的方法，对2Cr13钢汽轮机末级叶片进行了表面改性处理。经显微组织观察、物相分析和阳极极化曲线测定证明，激光处理后的合金组织更细小，表面耐蚀性比处理前更好，熔敷镍基G112合金后的耐蚀性提高尤其显著。实验得出了提高其耐蚀性的优化工艺条件。
关键字: 镍基合金 激光表面重熔 激光熔敷 耐蚀性
（Department of Materials, Basic Department,
Kunming University of Science and Technology, Kunming 650093, P. R. China）
Abstract:The laser surface remelting and clad Ni base alloys being used, the surface of last stage blades of 2Cr13 steel in steam turbines was modified to improve corrosion resistance. The microstructures, the phase analysis and the anodic polarization curves were examined. The results showed that the microstructure is more fine and the surface possesses better corrosion resistance than that before laser treatment. The optimal processing has been given for improvement surface corrosion resistance, through experiments.
Key words: Ni base alloy laser surface remelting laser cladding corrosion resistance
