铝硅氮化硼封严涂层热稳定性及可磨耗性能评价研究.pdfVIP

第8 卷第4 期 热 喷 涂 技 术 Vol.8, No.4 2016 年12 月 Thermal Spray Technology Dec., 2016 铝硅氮化硼封严涂层热稳定性及可磨耗性能评价研究 1,2 1,2 1,2 1,2 1,2 杨晓剑 ，刘通 ，刘建明 ，程旭莹 ，于月光 （1. 北京矿冶研究总院，北京100160 ； 2. 北京市工业部件表面强化与修复工程技术研究中心，北京102206 ） 摘要：采用大气等离子喷涂技术在Ti-6Al-4V 合金表面制备了铝硅氮化硼(AlSi/hBN) 封严涂层，对涂层试样进行 了静态空气下450 ℃的恒温氧化试验，分析了涂层的硬度、组织结构随保温时间的变化，并对不同保温时间后涂 层与钛合金叶片的对磨刮削可磨耗性进行了评价和分析研究，初步探讨了涂层在高温下长时间服役后的磨耗机制。 结果表明，AlSi/hBN 涂层在450 ℃下硬度、结合强度随保温时间延长先减小后增加，至500h 后趋于稳定；磨耗 机制以切削、犁沟为主，涂层可磨耗性能良好。 关键词：AlSi/hBN 涂层；等离子喷涂；高温氧化；组织性能；磨耗行为 中图分类号：TG174.4 文献标识码：A 文章编号：1674-7127 （2016 ）12-0002-7 DOI 10.3969/j .j ssn.1674-7127.2016.04.002 Research of Thermal Stability and Abradability of AlSi-hBN Abradable Seal Coating YANG Xiao-j ian1,2 ，LIU Tong1,2 , LIU Jian-ming1,2, CHENG Xu-ying1,2, YU Yue-guang1,2 (1. 1.Beij ing General Research Institute of Mining and Metallurgy ，Beij ing 100160 ，China ； 2.Beij ing Engineering Technology Research Center of Surface Strengthening and Repairing of Industry parts，Beij ing 100160，China) Abstract ：AlSi-hBN coating was prepared on the surface of Ti-6Al-4V alloy by plasma spraying. Static isothermal oxidation tests for the coating specimens were performed at 450 ℃. The variations of hardness and microstructure of the coating with dwelling time were analyzed, and its abradability and wear behaviors with the mate of titanium alloy blade was evaluated and researched, as well as the wear mechanisms serving at high temperature were discussed. The results indicate that the hardness increased with the extension of heat preservation time decreases first, 400h after stabilizing. Wear mainly are cutting and groo