Microstructure and corrosion properties of laser cladding MoNi based alloy coatings

作     者：LI XinZhi LIU ZongDe WANG YongTian 

作者机构：Key Laboratory of Condition Monitoring and Control for Power Plant Equipment of Ministry of Education North China Electric Power University 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2014年第57卷第5期

页      面：980-989页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.11372110 and 51101056) the National Science and Technology Support Program(Grant No.2011BAE12B03) the Fundamental Research Funds for the Central Universities(Grant No.12MS07) 

主　　题：laser cladding Mo-Ni Mo-NiCrBSi corrosion resistance 

摘      要：Mo-based alloys are widely used for their excellent wear and corrosion resistance as well as high temperature ***-NiCrBSi and Mo-Ni alloy coatings were prepared on 1020 water wall tube by laser cladding technology in the present *** microstructure and phase compositions were analyzed by means of the scanning electron microscopy(SEM),energy-dispersive spectroscopy(EDS)and X-ray diffractometry(XRD).The corrosion properties of the coatings were evaluated by an electrochemical experiment at room temperature in 3.5 wt.%NaCl *** increasing content of Mo,the structure homogeneity in Mo-Ni coatings deteriorated,the grain size increased,the average hardness and the corrosion resistance declined,due to the more content of harmful *** to the Mo-Ni coatings,the overall performance was better for the Mo-NiCrBSi,which had the higher hardness contributed by the element B and Si as well as the better corrosion resistance due to the addition of Cr.