In-situ Synthesis of WC/TaC Reinforced Nickel-Based Composite Alloy Coating by Laser Cladding

被引：6
|
作者：
Yong Yaowei [1 ,2 ]
Fu Wei [3 ]
Zhang Xiang [1 ]
Deng Qilin [1 ]
Yang Jianguo [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Shanghai 200240, Peoples R China
[2] Ningxia Univ, Yinchuan 750021, Peoples R China
[3] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Heilongjiang, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2017年 / 46卷 / 11期
基金：
中国国家自然科学基金;
关键词：
laser cladding; nickel-based alloy; tantalum (Ta); tantalum carbide (TaC); tungsten carbide (WC); WEAR-RESISTANCE; MICROSTRUCTURE; BEHAVIOR; EVOLUTION; SURFACE; CARBON;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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 Ta2O5 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 gamma-Ni dendrites, W2C, M7C3 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.
引用
收藏
页码：3176 / 3181
页数：6
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