LIANG Yong WANG Jun TONG Baiyun SI Zhongyao Institute of Metal Research
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Academia Sinica
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Shenyang
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China
金属学报(英文版)
The precipitation of χ-phase,σ-phase and carbides may be restrained or eliminated by laser melting the plasma sprayed Cr-Mo alloy coating,in which austenite of abundant block usual- ly occurred on medium carbon low alloying steels.The corrosion resistance of this coating to 0.5mol/L H_2SO_4 was examined to be superior to that of 18-8 stainless steel.The laser al- loying Cr-Mo coating also has excellent resistance to pitting corrosion,and no pitting ap- peared even it immersed in a medium containing Cl~- ions.
关键词:
Cr-Mo coating
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粱勇
,
王俊
,
佟百运
,
斯重遥
金属学报
本文研究了中碳低合金钢Cr—Mo涂层的激光合金化熔区的显微结构和耐蚀性能。实验结果表明,在3Cr18Mo6合金化涂层中存在大量的块状奥氏体,经激光处理能抑制或大大减少χ相,σ相及碳化物的析出。该合金化层在0.5mol/L H_2SO_4中耐蚀性优于18-8不锈钢,同时在含Cl离子的介质中没有发生点蚀现象,具有优异的耐点蚀性能
关键词:
Cr-Mo涂层激光合金化
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laser melting
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microstructure
