Chinese Journal of Lasers, Volume. 47, Issue 1, 0102008(2020)
Microstructure and High-Temperature Friction and Wear Properties of TiC/CaF2/Inconel 718 Composite Fabricated Using Laser Melting Deposition Technique
A high-temperature wear-resistant self-lubricating composite based on TiC/CaF2/Inconel 718 superalloy is fabricated using the laser melting deposition technique. The composite's microstructure, microhardness, and high-temperature dry-sliding friction and wear properties are investigated. Furthermore, its high-temperature wear mechanism is studied. The results demonstrate that the composite's microstructure comprises TiC, CaF2, Cr7C3, γ″-Ni3Nb, and γ-(Ni, Fe). In-situ synthesized TiC primary phases and fine CaF2/TiC eutectics are uniformly scattered on a matrix of γ-(Ni, Fe) solid solution, which is strengthened by super-fine Cr7C3 and γ″-Ni3Nb high-temperature strengthening phases. The composite's average microhardness is approximate 820 HV. Compared with the Inconel 718 reference specimen fabricated by laser melting deposition technique, the composite has good high-temperature wear-resistance and a low and stable friction coefficient. The composite's excellent high-temperature friction and wear properties are derived from its reasonable microstructure.
Get Citation
Copy Citation Text
Zhihong Liu, Yuanfu Liu, Lele Zhang, Deqiang Chen, Chenxiao Shi, Fugang Lu, Zhicheng Feng, Jie Jin. Microstructure and High-Temperature Friction and Wear Properties of TiC/CaF2/Inconel 718 Composite Fabricated Using Laser Melting Deposition Technique[J]. Chinese Journal of Lasers, 2020, 47(1): 0102008
Category: laser manufacturing
Received: Aug. 7, 2019
Accepted: Oct. 9, 2019
Published Online: Jan. 9, 2020
The Author Email: Yuanfu Liu (yfliu@bjtu.edu.cn)