铝硅聚苯酯涂层热稳定性及与钛合金叶片对磨刮削可磨耗性研究  

Thermal Stability of AlSi-Polyester Coating and Its Abradability Rubbed to Titanium Alloy Blade

作　　者：程旭莹 刘建明[1,2] 章德铭[1,2] 沈婕[1,2] 刘通[1,2] 

机构地区：[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

出　　处：《热喷涂技术》2016年第1期63-71,共9页Thermal Spray Technology

基　　金：国家国际科技合作专项项目(2013DFB50390);863计划(8632012AA03A512)

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聚苯酯(AlSi/PHB)涂层,分别对涂层试样进行了静态空气下127℃、200℃、250℃和350℃的恒温氧化试验,分析了涂层的组织结构、硬度、结合强度随保温时间的变化,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研究,初步探讨了涂层在高温下服役的失效形式和机理。结果表明:AlSi/PHB涂层在200℃及以下表现出优异的热稳定性;在250℃和350℃下涂层热稳定性较差,在350℃下保温至100h时涂层可磨耗性能明显降低。AlSi/PHB 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 four different temperatures(127℃,200℃,50 ℃ and 350 ℃). The variations of microstructure, hardness and bonding strength of the coating with dwelling time were analyzed, and its abradability with the mate of titanium alloy blade was evaluated and researched, as well as the failure mode and mechanism serving at high temperature was discussed. The results indicate that AlSi/PHB coating shows excellent thermal stability for long term service at or below 200 ℃, but at 250 ℃ or 350 ℃ its thermal stability is unsatisfactory, after a heat treatment of 100 h at 350℃ the abradability of the coating degenerates significantly.

关 键 词：AlSi/PHB涂层 等离子喷涂 高温氧化 组织性能 可磨耗性 

分 类 号：TG174.4[金属学及工艺—金属表面处理]