热处理对激光熔覆钛基复合涂层组织和微动磨损性能的影响

doi:10.11868/j.issn.1001-4381.2017.000698

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摘要为研究不同温度热处理对激光熔覆钛基复合涂层组织和微动磨损性能的影响，采用激光熔覆技术在TA2钛合金表面制备40%Ti-25.2%TiC-34.8%WS₂（质量分数）复合涂层，将涂层分别置于300，500℃和700℃真空中保温1h，分析热处理前后涂层的显微组织和微动磨损耐磨性能。结果表明：未经过热处理涂层及经过不同温度热处理涂层的主要物相均为α-Ti，（Ti，W）C_1-x，TiC，Ti₂SC和TiS。未热处理及经过300，500℃和700℃热处理1h涂层的显微硬度分别为1049.8，980.7，1143.3HV_0.5和1190.7HV_0.5。经过700℃热处理1h涂层表现出优异的微动磨损性能，磨损机理为黏着磨损和磨粒磨损。

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	刘秀波
	周仲炎
	翟永杰
	乔世杰
	徐江宁
	罗迎社
	涂溶

关键词 ：激光熔覆, 钛基复合涂层, 热处理, 微动磨损

Abstract：To study the effect of heat treatment at different temperatures on microstructure and fretting wear resistance of laser clad Ti-matrix composite coatings, Ti-matrix composite coatings were fabricated by laser cladding with the powder precursor:40%Ti-25.2%TiC-34.8%WS₂ (mass fraction). The coatings were heated at 300,500℃ and 700℃ in vacuum for 1h respectively, and the microstructure and fretting wear resistance of coatings were analyzed. Results indicate that the main phase compositions of coatings are all composed of α-Ti, (Ti, W)C_1-x, TiC, Ti₂SC and TiS. The microhardness of coatings without heat treatment and with heat treatment at 300,500℃ and 700℃ is 1049.8,980.7,1143.3HV_0.5 and 1190.7HV_0.5. The coating with heat treatment at 700℃ exhibits excellent fretting wear resistance and the wear mechanism is mainly adhesive wear and abrasive wear.

Key words： laser cladding Ti-matrix composite coating heat treatment fretting wear

收稿日期: 2017-06-06 出版日期: 2018-05-16

中图分类号:

TG174.44

通讯作者: 刘秀波(1968-),男,博士,教授,研究方向:表面工程与摩擦学,金属材料,激光加工,联系地址:湖南省长沙市韶山南路498号中南林业科技大学流变力学与材料工程研究所(410004),E-mail:liuxiubosz@163.com,liuxiubo@suda.edu.cn E-mail: liuxiubosz@163.com,liuxiubo@suda.edu.cn

引用本文:

刘秀波, 周仲炎, 翟永杰, 乔世杰, 徐江宁, 罗迎社, 涂溶. 热处理对激光熔覆钛基复合涂层组织和微动磨损性能的影响[J]. 材料工程, 2018, 46(5): 79-85.
LIU Xiu-bo, ZHOU Zhong-yan, ZHAI Yong-jie, QIAO Shi-jie, XU Jiang-ning, LUO Ying-she, TU Rong. Effect of Heat Treatment on Microstructure and Fretting Wear Resistance of Laser Clad Ti-matrix Composite Coatings. Journal of Materials Engineering, 2018, 46(5): 79-85.

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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2017.000698 或 http://jme.biam.ac.cn/CN/Y2018/V46/I5/79

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