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TC4合金表面氬弧熔覆TiCp/Ti基復合涂層組織及耐磨性
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黑龍江省教育廳科學技術研究項目（12511469，11551419）；黑龍江科技學院青年教師基金項目


Microstructure and Wear Resistance of TiCp/Ti Composite Coating on TC4 Alloy by Argon Arc Cladding
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    摘要:

    利用氬弧熔覆技術在TC4合金表面制備出TiC增強的Ti基復合涂層。利用SEM、XRD和EDS分析了熔覆涂層的顯微組織；利用顯微硬度儀測試了復合涂層的顯微硬度；利用摩擦磨損試驗機測試了涂層在室溫干滑動磨損條件下的耐磨性能。結果表明：氬弧熔覆涂層組織均勻致密，熔覆層與基體呈冶金結合，涂層中有大量的TiC樹枝晶和條塊狀TiC顆粒；復合涂層明顯改善了TC4合金的表面硬度，HV平均硬度可達9 GPa；復合涂層室溫干滑動磨損機制為磨粒磨損和輕微粘著磨損。

    Abstract:

    Ti-based composite coating reinforced by TiC particles was prepared on the surface of TC4 alloy by means of argon arc cladding technique using the pre-alloyed powder of TiC and Ti. The microstructure of the coating was analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy-dispersive spectrum (EDS). Microhardness and wear resistance at room temperature of the composite coating were examined by means of microhardness tester and wear tester, respectively. The results indicate that the coating microstructure is uniform and dense, and excellent bonding exists between the coating and the TC4 alloy substrate. The coating has a great quantity of dendrite TiC and lump shaped TiC particles. The composite coating reinforced by TiC particle apparently improves surface hardness of TC4 alloy, the average microhardness can reach 9 GPa. The wear mechanism of coatings results from abrasive wear and slight adhesive wear.

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孟君晟,史曉萍,王振廷,王永東. TC4合金表面氬弧熔覆TiCp/Ti基復合涂層組織及耐磨性[J].稀有金屬材料與工程,2012,41(7):1259~1262.[Meng Junsheng, Shi Xiaoping, Wang Zhenting, Wang Yongdong. Microstructure and Wear Resistance of TiCp/Ti Composite Coating on TC4 Alloy by Argon Arc Cladding[J]. Rare Metal Materials and Engineering,2012,41(7):1259~1262.]
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  • 收稿日期:2011-07-29
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