(昆明理工大學材料系，基礎部，昆明 650093)
摘 要: 利用激光表面重熔和激光熔敷鎳基合金的方法，對2Cr13鋼汽輪機末級葉片進行了表面改性處理。經顯微組織觀察、物相分析和陽極極化曲線測定證明，激光處理后的合金組織更細小，表面耐蝕性比處理前更好，熔敷鎳基G112合金后的耐蝕性提高尤其顯著。實驗得出了提高其耐蝕性的優(yōu)化工藝條件。
關鍵字: 鎳基合金 激光表面重熔 激光熔敷 耐蝕性
（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
