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Proceedings Paper

Microstructure of laser-clad high-temperature self-lubricating wear-resistant composite coatings
Author(s): X. B. Liu; C. M. Wang; L. G. Yu; Hua Ming Wang
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Paper 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.

Paper Details

Date Published: 8 September 1999
PDF: 5 pages
Proc. SPIE 3862, 1999 International Conference on Industrial Lasers, (8 September 1999); doi: 10.1117/12.361101
Show Author Affiliations
X. B. Liu, Beijing Univ. of Aeronautics and Astronautics (China)
C. M. Wang, Beijing Univ. of Aeronautics and Astronautics (China)
L. G. Yu, Beijing Univ. of Aeronautics and Astronautics (China)
Hua Ming Wang, Beijing Univ. of Aeronautics and Astronautics (China)


Published in SPIE Proceedings Vol. 3862:
1999 International Conference on Industrial Lasers
Fuxi Gan; Horst Weber; Zaiguang Li; Qingming Chen, Editor(s)

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