Laser cladding for high-temperature self-lubricating wear-resistant composite coatings on v-TiAl intermetallic alloy Ti-48Al-2Cr-2Nb

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

doi:10.1117/12.377035

7 February 2000 Laser cladding for high-temperature self-lubricating wear-resistant composite coatings on γ-TiAl intermetallic alloy Ti-48Al-2Cr-2Nb

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

Author Affiliations +

Proceedings Volume 3888, High-Power Lasers in Manufacturing; (2000) https://doi.org/10.1117/12.377035
Event: Advanced High-Power Lasers and Applications, 1999, Osaka, Japan

Abstract

High-temperature self-lubricating wear-resistant metal matrix composite coatings are fabricated on substrate of a (gamma) - TiAl intermetallic alloy Ti-48Al-2Cr-2Nb by laser cladding. The hybrid (gamma) -NiCr metal matrix composite coating is mainly reinforced by rapidly solidified wear-resistant phase of hyper-eutectic M₇C₃ and self-lubricating particles of Ag and CaF₂ or CaAgF₄. Microstructure and hardness within the whole laser clad composite coating is homogeneous and the bonding to the substrate is purely metallurgical. Both hardness and dry sliding wear resistance of the (gamma) -TiAl intermetallic alloy are significantly enhanced after laser cladding treatment.

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X. B. Liu, C. M. Wang, L. G. Yu, and Hua Ming Wang "Laser cladding for high-temperature self-lubricating wear-resistant composite coatings on γ-TiAl intermetallic alloy Ti-48Al-2Cr-2Nb", Proc. SPIE 3888, High-Power Lasers in Manufacturing, (7 February 2000); https://doi.org/10.1117/12.377035

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