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采用双辉等离子表面冶金技术在风力塔架表面进行了Ni-Cr共渗处理,研究了不同共渗温度和共渗时间下合金层的物相组成、显微组织和耐腐蚀性能变化规律。结果表明,不同共渗温度和共渗时间下的风力塔架表面合金层的主要物相都为Ni_(2.9)Cr_(0.7)Fe_(0.36),在衍射角为75.6°处还出现了少量Ni3_Fe相;随着共渗温度的升高和共渗时间的延长,Ni_(2.9)Cr_(0.7)Fe_(0.36)主衍射峰从(111)晶面和(200)晶面过渡至(220)晶面;不同共渗温度下得到的Ni-Cr合金层的耐腐蚀性能都要比风力塔架基体好,且共渗温度为1000℃时得到的合金层的耐腐蚀性能最佳;不同共渗时间下得到的Ni-Cr合金层的耐腐蚀性能都要比风力塔架基体好,且共渗时间为1 h和3 h时得到的合金层的耐腐蚀性能最佳。
Ni-Cr permeation was carried out on the surface of wind tower by double-glow plasma surface metallurgy. The variation of phase composition, microstructure and corrosion resistance of the alloy layer under different co-infiltration temperature and co-infiltration time were studied. The results show that the main phase of the alloy layer on the surface of wind tower is Ni 2.9 Cr 0.7 0.7 Fe 0.36 at different co-infiltration temperature and co-infiltration time, and a small amount of Ni 3 Fe at diffraction angle 75.6 ° Phase. The main diffraction peak of Ni_ (2.9) Cr_ (0.7) Fe_ (0.36) transitioned from (111) and (200) planes to (220) planes with the increase of the co- Surface; the corrosion resistance of Ni-Cr alloy layer obtained under different co-infiltration temperature is better than that of the wind tower, and the corrosion resistance of the alloy layer obtained when the co-infiltration temperature is 1000 ℃ is the best; The corrosion resistance of the Ni-Cr alloy layer is better than that of the wind tower, and the corrosion resistance of the alloy layer obtained when the permeation time is 1 h and 3 h is the best.