In-situ Synthesis of WC/TaC Reinforced Nickel-Based Composite Alloy Coating by Laser Cladding. Issue 11 (November 2017)

• Record Type: Journal Article
• Authors: Yaowei, Yong; Wei, Fu; Xiang, Zhang; Qilin, Deng; Jianguo, Yang
• Is Part Of: Xi you jin shu cai liao yu gong cheng. Volume 46:Issue 11(2017)
• Page Start: 3176
• Page End: 3181
• Publication Date: 2017-11
• Subjects: laser cladding -- nickel-based alloy -- tantalum (Ta) -- tantalum carbide (TaC) -- tungsten carbide (WC); Nonferrous metals -- Periodicals; 669.05
• DOI: 10.1016/S1875-5372(18)30024-9
• Languages: English
• ISSNs: 1875-5372

Abstract

Abstract: An in-situ synthesized WC/TaC reinforced nickel-based composite coatings have been fabricated on AISI 1045 mild carbon steel substrate by laser cladding of powder mixture of Ni60/WC with Ta2 O5 and graphite. The microstructure and hardness distribution of WC/TaC/Ni60 composite coating were investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques. Results show that the microstructure of the coating has a metallurgical bonding with substrate and is mainly composed of γ -Ni dendrites, W2 C, M 7 C3 carbides, and dispersed TaC particles. The hardness HV of WC/TaC/Ni60 composite coating has been enhanced to a value similar to 9650 MPa, which is 1.3 times higher than that of Ni60 coating. Measurement results demonstrate that these improvements are attributed to the presence of in-situ synthesized TaC particles, microstructure change and phase variations.