NiCr-Cr3C2 is an ideal wear resistant coating due to its hard and compact characteristics.With the transition layers of Ni45 and Ni60 respectively,25NiCr-75Cr3C2 is coated on the 45 steel substrate by laser cladding technology to prepare great hard wear resistant coatings.The micro structure and components of the coatings are observed and analyzed respectively through electron probe micro analyzer (EPMA)and energy dispersive spectrometer (EDS).And the micro hardness is measured.Test results show that the 25NiCr-75Cr3C2 coating has good metallurgical bonding with the substrate with transition layer of nickel based alloy;the hardness of the coatings is significantly higher than that of the substrate.Compared with Ni45/25NiCr-75Cr3C2 coating,the Ni60/25NiCr-75Cr3C2 coating has higher hardness;with different transition layers,the micro structure and components of 25NiCr-75Cr3C2 coatings are different.
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臧春城,王延忠,张以都.激光熔覆特定材料涂层的微观组织和硬度特性[J].激光与红外,2015,45(8):897~@ ZANG Chun-cheng, WANG Yan-zhong, ZHANG Yi-du. Micro structure and hardness of Ni-/NiCr-Cr3C2 coating by laser cladding[J]. LASER & INFRARED,2015,45(8):897~@