Microstructures and properties of Fe-Co-B-Si-Nb coating prepared by laser cladding and remelting
Microstructures and properties of Fe-Co-B-Si-Nb coating prepared by laser cladding and remelting作者机构:Shanghai Key Laboratory of Materials Laser Processing and Modification School of Materials Science and Engineering Shanghai Jiao Tong University Shanghai 200240
出 版 物:《China Welding》 (中国焊接(英文版))
年 卷 期:2011年第20卷第1期
页 面:54-58页
核心收录:
学科分类:080503[工学-材料加工工程] 07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程(可授工学、理学学位)] 0702[理学-物理学]
基 金:Acknowledgements The authors would like to thank the financial support provided by the National Natural Science Foundation of China (No. 50971091 ) the Ministry of the Science and Technology of the People' s Republic of China ( No. 2009DFB50350 ) and the Economy and Information Commission of Shanghai Municipality (No. zx08089)
主 题:laser cladding laser remelting amorphous metallic coating microstructure
摘 要:High power laser cladding of [ ( Fe0. 5 Co0. 5 ) 0. 75 B0. 2 Si0.05 ] 95. 7 Nb4. 3 powder mixture afier-remelting was performed to fabricate Fe-based metallic glass coating on the surface of steel of China Classification Society: Grade B (CCS-B). Scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM) with energy dispersive spectrometer (EDS), Vickers hardness tester and corrosion resistance tester were employed to characterize microstructures and evaluate properties of this coating. According to the results of SEM, XRD and TEM, the cladding coating consisted of nanocrystalline embedded in amorphous phase. EDS data indicated that Nb segregated in the amorphous matrix. The results of hardness test revealed that the hardness of the top layer was higher than that of the inner layer of the coating. The coating exhibited excellent corrosion resistance in a 3.5% NaCl solution.