Microstructure and Properties of Ti<sub>2</sub>SC-Ti<sub>2</sub>Ni Composite Structural Phase Self-Lubricating Laser Cladding Layer on TC4 Surface

Tiangang Zhang; Qian Zhang; Huaifeng Zhuang; Peng Xue; Bo Yao; Yutong Xu; Baoxuan Li

doi:10.3788/AOS202040.1114001

Acta Optica Sinica, Volume. 40, Issue 11, 1114001(2020)

Microstructure and Properties of Ti₂SC-Ti₂Ni Composite Structural Phase Self-Lubricating Laser Cladding Layer on TC4 Surface

Tiangang Zhang¹, Qian Zhang², Huaifeng Zhuang³, Peng Xue^1、*, Bo Yao², Yutong Xu³, and Baoxuan Li³

Author Affiliations

¹Engineering Techniques Training Center, Civil Aviation University of China, Tianjin 300300, China

²College of Aeronautical Engineering, Civil Aviation University of China, Tianjin 300300, China

³Sino-European Institute of Aviation Engineering, Civil Aviation University of China, Tianjin 300300, China

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To improve the tribological properties of TC4 surfaces, a TC4+Ni60+Ni-MoS₂ multi-component composite self-lubricating wear-resistant coating was prepared on the TC4 surface by the TruDisk4002 coaxial powder feeding fiber laser. The microstructure and the tribological performance of this coating were also analyzed. The results show that there are no cracks but a few pores within the coating. The main precipitation phases of the coating are TiC, Ti₂Ni, Ti₂SC, and α-Ti, and they are uniformly and compactly distributed within the coating. Ti₂SC and Ti₂Ni form the Ti₂SC-Ti₂Ni mosaic structure composite phase, and the misfit between (01 $\overset{ˉ}{1}$ 0 $)_{T i_{2} SC}$ and (001 $)_{T i_{2} Ni}$ is 3.18%. Ti₂SC and Ti₂Ni form the coherent interface relationship. The coating micro-hardness is obviously higher than that of the substrate. The Ti₂SC-Ti₂Ni mosaic composite phase can effectively improve the anti-friction and wear resistance of coatings, and the wear mechanism of coatings is abrasive wear.

Keywords

laser cladding laser technique self-lubrication TC4 Ti2SC-Ti2Ni composite structure phase tribological properties two-dimensional misfit

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Tiangang Zhang, Qian Zhang, Huaifeng Zhuang, Peng Xue, Bo Yao, Yutong Xu, Baoxuan Li. Microstructure and Properties of Ti₂SC-Ti₂Ni Composite Structural Phase Self-Lubricating Laser Cladding Layer on TC4 Surface[J]. Acta Optica Sinica, 2020, 40(11): 1114001

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Paper Information

Category: Lasers and Laser Optics

Received: Jan. 20, 2020

Accepted: Mar. 9, 2020

Published Online: Jun. 10, 2020

The Author Email: Xue Peng (797341@qq.com)

DOI:10.3788/AOS202040.1114001

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology