Research on Laser Cladded Nickel Based Nanometer Tungsten Carbide Composite Coating
来源期刊：材料热处理学报2004年第5期
论文作者：DAI Jian-qiang ZOU Chang-gu YAN Min-jie XI Wen-long ZHANG Guang-jun GE Da-fang WANG Hui-Ping
关键词：Laser cladding; nanometer granulation; nickel based tungsten carbide coating; microstructure; microhardness; and bonding strength;
摘 要：CO2 laser is adopted on the surface of austenitic stainless steel (1Cr18Ni9) to clad nickel based nanometer WC/Co composite coating. SEM, EDAX, XRD, AFM and Scratch Testers are adopted to conduct analysis and research on the microstructure, composition, phase and bonding strength of the coating. Results indicate that the microstructure of coating is metallurgically bonded with stainless steel base, eliminating porosities and cracks. The coating has a considerable quantity of nanometer particles visible with a granularity ≤ 100nm under a nanoscope atomic microscope. The bonding strength of the laser cladded coating is remarkably improved respectively compared with conventional hot-sprayed coating and spray welding. The nanometer effect of nanometer WC/Co introduced into the coating plays an important role in the laser cladding processes.
DAI Jian-qiang1，ZOU Chang-gu1，YAN Min-jie1，XI Wen-long1，ZHANG Guang-jun1，GE Da-fang1，WANG Hui-Ping1
(1.Shanghai University of Engineering Science, Shanghai, China)
摘要:CO2 laser is adopted on the surface of austenitic stainless steel (1Cr18Ni9) to clad nickel based nanometer WC/Co composite coating. SEM, EDAX, XRD, AFM and Scratch Testers are adopted to conduct analysis and research on the microstructure, composition, phase and bonding strength of the coating. Results indicate that the microstructure of coating is metallurgically bonded with stainless steel base, eliminating porosities and cracks. The coating has a considerable quantity of nanometer particles visible with a granularity ≤ 100nm under a nanoscope atomic microscope. The bonding strength of the laser cladded coating is remarkably improved respectively compared with conventional hot-sprayed coating and spray welding. The nanometer effect of nanometer WC/Co introduced into the coating plays an important role in the laser cladding processes.
关键词:Laser cladding; nanometer granulation; nickel based tungsten carbide coating; microstructure; microhardness; and bonding strength;
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