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热喷涂过程氧化对钛合金/涂层结合性能的影响

纪朝辉a,孙振a,杨律a,朱灏楠a,张学伟a,薛茹b   

  1. (taptap下载安装安卓a.理学院;b.安全科学与工程学院,天津300300)
  • 收稿日期:2012-11-27 修回日期:2012-12-24 出版日期:2014-02-24 发布日期:2014-01-02
  • 作者简介:纪朝辉(1963—),男,吉林松原人,教授,硕士,研究方向为材料表面工程.
  • 基金资助:

    国家级大学生创新创业训练计划项目(IECAUC12065);中央高校基本科研业务费专项(31220139Y31)

Effect of oxidation process on binding properties of titanium alloy/coating during thermal spraying

JI Zhao-huia,SUN Zhena,YANG Lva,ZHU Hao-nana,ZHANG Xue-weia,XUE Rub   

  1. (a. Science College;b. College of Safety Science & Engineering,CAUC,Tianjin 300300,China)
  • Received:2012-11-27 Revised:2012-12-24 Online:2014-02-24 Published:2014-01-02

摘要:

通过探究热喷涂过程中钛合金的氧化机制,得出其对涂层/基体结合性能的影响。利用HOVF方法分别在不同处理状态下的钛合金表面制备WC 涂层,对比两种试样的元素含量、显微组织和力学性能,分析氧化过程对涂层结合性能的影响。经EDS分析,喷砂过程对钛合金的氧化作用影响很小,基本可以忽略;而通过拉伸和弯折实验发现,喷涂过程对涂层/基体的氧化影响较大,导致最终的结合性能存在差异,结果显示喷涂过程中的氧化会造成涂层/基体结合性能下降。

关键词: 涂层/基体, HOVF, 钛合金, 结合性能, 氧化

Abstract:

By exploring the oxidation mechanism of titanium alloy during the thermal spray process,its effect on binding properties of the coating/substrate is obtained. Using the method of HVOF,WC coating on titanium alloy surface is prepared under different processing states. Comparing two samples'element contents,microstructures and mechanical properties,the effect of oxidation process on binding properties of titanium alloy/coating during thermal spraying is analysed. EDS analyses show that the sand blasting process has little effect on the oxidation of titanium and it can be ignored basically. By stretching and bending tests we find that oxidation in spraying process has a greater impact on the coating/substrate and leads to different binding properties finally. The results show that the oxidation during spraying process can cause degradation of combination performance of coating/substrate.

Key words: coating/substrate, HOVF, titanium alloy, binding properties, oxidation

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