Wear and heat shock resistance of Ni-WC coating on mould copper plate fabricated by laser

Journal of Materials Research and Technology

卷:9

Ying Liu¹  Tianhao Xu²  Yu Liu³  Yali Gao³  Chi Di³ 

[1] Corresponding author.;

[2] Nanchang Institute of Technology, No. 901 Yingxiong Road, Changbei Economic Development District, Nanchang CN 330044, China;

[3] School of Mechanical Engineering, Northeast Electric Power University, No. 169 Changchun Road, Chuanying District, Jilin CN 132012, China;

关键词: Laser cladding;    Mould copper;    Wear resistance;    Heat shock resistance;    Microstructure;   

DOI  :  

来源: DOAJ

【 摘 要 】

A Ni-WC coating was fabricated successively on a copper substrate by laser. The microstructure, hardness and wear resistance were investigated. The thickness of Ni-WC coating was 0.65 mm and average hardness of strengthening layer was 667HV0.1, which was approximately 7.8 times higher than the hardness of copper substrate. The wear volume of Ni-WC coating was only 0.014 mm3, which was only 1.02% wear volume of copper substrate. The decrease in wear volume was mainly due to presence of reinforced phases, such as γ-Ni, Cr0.19Fe0.7Ni0.11, M7C3, M23C6 and WC. In addition, there was no coating peeled off after 100 times trials of heat shock resistance experiment at 800℃. The experimental results show that this Ni-WC coating has a good metallurgical bonding strength and hardness, and it also has good wear resistance and high temperature property, which is helpful to improve the service life of mould copper plate.

【 授权许可】

Unknown