Microstructure and properties of IN718/WC-12Co composite coating by laser cladding. Issue 7 (1st April 2022)

• Record Type: Journal Article
• Authors: Xu, Peihua; Zhu, Lida; Xue, Pengsheng; Yang, Zhichao; Wang, Shuhao; Ning, Jinsheng; Meng, Guiru; Lan, Qing; Qin, Shaoqing
• Is Part Of: Ceramics international. Volume 48:Issue 7(2022)
• Page Start: 9218
• Page End: 9228
• Publication Date: 2022-04-01
• Subjects: Laser cladding -- IN718/WC-12Co coating -- Tribological properties -- Machinability; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.12.108
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: To improve microhardness and tribological properties of IN718, WC-12Co particles were added to it by the laser cladding. This study investigated the effect of the content of WC-12Co on the microstructure, phase composition, microhardness, tribological properties and machinability of the composite coating. The results shows that WC-12Co can inhibit the growth of columnar grains and the (200) growth direction of γ-Ni, and refine the microstructure. The average microhardness of coating increases from 245.83HV0.5 to 462.63HV0.5 with the increase of WC-12Co content. The coating containing 30% wt. WC-12Co has the smallest wear loss, that is, the best wear resistance. However, the coating containing 20 wt% WC-12Co has the lowest COF (0.518), that is, the best antifriction capability. With the increase of WC-12Co content, the milling force increases and the instability of the cutting process is aggravated. Moreover, with the addition of WC-12Co, the wear mechanism changed from adhesive wear to abrasive wear and oxidation wear.