Investigation of wear behaviors from room temperature to 500 °C of in-situ synthesized ceramics reinforced composite coating on TA2 alloy by laser cladding

Journal of Materials Research and Technology

Jue Liang¹  Xiu-Bo Liu²  Mian Wang³  Ying-She Luo³  Jin Ke⁴  De-Qiang Chen⁴ 

[1] Hunan Province Key Laboratory of Engineering Rheology, Central South University of Forestry &;Technology, Central South University of Forestry &Technology, Changsha 410004, PR China;;Hunan Province Key Laboratory of Materials Surface/Interface Science &

关键词: Laser cladding;    Composite coating;    Carbide ceramics;    In-situ synthesis;    Wear behaviors;   

DOI  :  

来源: DOAJ

【 摘 要 】

In order to enhance the wear property of TA2 alloy, ceramics reinforced composite coating was prepared on TA2 alloy by laser cladding with preplaced mixed WS2-TiC-Ti powders (mole ratio of 1:3:6). The micro-structure, phase compositions and micro-hardness of composite coating were analyzed in detail. The dry-sliding wear behaviors and corresponding wear mechanisms of TA2 alloy substrate and composite coating at different test temperatures (RT, 250 and 500 °C) were also studied systematically. The results showed that α-Ti, TiS, Ti2SC, (Ti, W)C1−x and TiC were in-situ synthesized in laser processing. The micro-hardness of the coating was improved significantly due to the formation of carbide ceramics Ti2SC, (Ti, W)C1−x and TiC. The coating exhibited excellent wear property at 500 °C, i.e. low friction coefficient (0.339) and wear rate (4.87 × 10−6 mm3/Nm). The predominant wear mechanism of the composite coating was formation and peeling off of lubricating transfer films, with incidental effect of adhesive wear and oxidation wear.

【 授权许可】

Unknown