Microstructure of laser-clad high-temperature self-lubricating wear-resistant composite coatings

X. B. Liu; C. M. Wang; L. G. Yu; Hua Ming Wang

doi:10.1117/12.361101

8 September 1999 Microstructure of laser-clad high-temperature self-lubricating wear-resistant composite coatings

X. B. Liu, C. M. Wang, L. G. Yu, Hua Ming Wang

Proceedings Volume 3862, 1999 International Conference on Industrial Lasers; (1999) https://doi.org/10.1117/12.361101
Event: International Symposium on Industrial Lasers, 1999, Wuhan, China

Abstract

In this paper, a 5 kW cw CO₂ laser was used to fabricate a new high-temperature self-lubricating wear-resistant composite coating on austenite stainless steel 1Cr18Ni9Ti. Microstructure of the coatings was characterized by OM, SEM, XRD and EDS as functions of laser processing parameters. The hybrid composite coating consists of rapidly solidified wear-resistant primary Cr₇C₃ and eutectic Cr₂₃C₆ carbides, high-temperature self-lubricating CaAgF₄ or CaF₂ particles and the oxidation-resistant austenitic Ni-Cr matrix. Microstructure and hardness within the whole laser clad composite coating is homogeneous and the bonding to the substrate is purely metallurgical. Microhardness of the composite coating is 700 approximately 1000 HV on average. The hybrid composite coatings fabricated by laser cladding are expected to have good high-temperature tribological properties.

Citation Download Citation

X. B. Liu, C. M. Wang, L. G. Yu, and Hua Ming Wang "Microstructure of laser-clad high-temperature self-lubricating wear-resistant composite coatings", Proc. SPIE 3862, 1999 International Conference on Industrial Lasers, (8 September 1999); https://doi.org/10.1117/12.361101

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