Amorphization of Fe_(38)Ni_(30)Si_(16)B_(14)V_2 surface layers by laser cladding  

作　　者：朱庆军 王新洪 曲仕尧 邹增大 

机构地区：[1]School of Materials Science and Engineering,Shandong University

出　　处：《中国有色金属学会会刊：英文版》2008年第2期270-273,共4页Transactions of Nonferrous Metals Society of China

基　　金：Project(20060422020)supported by the Research Fund for the Doctoral Program of Higher Education;Projects(06GG3204015,06GG3203009)supported by the Development Program of Shandong Province,China

摘　　要：Fe38Ni30Si16B14V2 amorphous composite coatings were fabricated by laser cladding on AISI 1045 steel in order to increase the wear resistance.The phase and microstructure of the coatings were analyzed by X-ray diffractometry and transmission electron microscopy.The wear properties of the coatings were also investigated by means of sliding wear test.The results show that the coating consists of amorphous phase in majority and nanocrystalline phase in minority.The amorphous coatings can be obtained while the scanning speed is 3 500 mm/min and the laser power is 4.8 kW.With increase of the laser power,the amorphous phase in the coating increases when it is lower than 4.8 kW.A gradient distribution of the microhardness ranges from Hv0.2 1 208 to Hv0.2 891 in the coating from top surface of the coating to the substrate.The amorphous coating is found to possess better property of wear than AISI 1045 steel substrate.Fe38Ni30Si16B14V2 amorphous composite coatings were fabricated by laser cladding on AISI 1045 steel in order to increase the wear resistance. The phase and microstructure of the coatings were analyzed by X-ray diffractometry and transmission electron microscopy. The wear properties of the coatings were also investigated by means of sliding wear test. The results show that the coating consists of amorphous phase in majority and nanocrystalline phase in minority. The amorphous coatings can be obtained while the scanning speed is 3 500 mm/min and the laser power is 4.8 kW. With increase of the laser power, the amorphous phase in the coating increases when it is lower than 4.8 kW. A gradient distribution of the microhardness ranges from Hv0.2 1 208 to Hv0.2 891 in the coating from top surface of the coating to the substrate. The amorphous coating is found to possess better property of wear than AISI 1045 steel substrate.

关 键 词：铁 硅 表层 激光覆层 合金 冶金技术 

分 类 号：TG174.4[金属学及工艺—金属表面处理]