文献类型：期刊文献

中文题名：激光气体氮化原位合成制备TiN/Ti_(3)Al复合涂层及其抗高温冲蚀性能

英文题名：In-situ Synthesized TiN/Ti_(3)Al Composite Coating by Laser Gas Nitriding and Its High-Temperature Erosion Resistance

作者：宿冠群[1];付尧[1];张显程[1];王正东[1];涂善东[1]

机构：[1]华东理工大学,承压系统与安全教育部重点实验室,上海200237

年份：2018

卷号：42

期号：2

起止页码：52

中文期刊名：机械工程材料

外文期刊名：Materials For Mechanical Engineering

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD_E2017_2018】；

基金：国家自然科学基金资助项目(51322510,51371082)

语种：中文

中文关键词：Ti-6Al-4V钛合金;激光表面改性;复合涂层;高温冲蚀

外文关键词：Ti-6Ab4V titanium alloy;laser surface modification;composite coating;high temperature erosion

摘要：通过在氮气中加入铝粉,采用激光气体氮化技术在Ti-6Al-4V钛合金表面原位制备了TiN/Ti_(3)Al复合涂层,研究了涂层的微观形貌、物相组成、硬度分布以及抗含SiC和SiO_(2)颗粒的高温高速水蒸气冲蚀的能力。结果表明:涂层的表面硬度为(1400±50)HV,是Ti-6Al-4V钛合金的4倍;用SiC颗粒冲蚀较短时间或用SiO_(2)颗粒冲蚀后,涂层的冲蚀质量损失随冲蚀角度的增大而增加,Ti-6Al-4V钛合金的则减小;在相同冲蚀角度下,涂层的冲蚀质量损失随冲蚀颗粒硬度的增加而增大,Ti-6Al-4V合金的冲蚀质量损失在较小冲蚀角度时也遵循此规律,但在较大冲蚀角度下,质量损失的变化不大。
TiN/Ti3Al composite coating was in-situ synthesized on the surface of Ti-6Al-4V alloy by laser gas nitriding technique with the aluminium powder mixed in the nitrogen.The micromorphology,phase composition,hardness distribution and the anti-erosion performance with high-temperature high-velocity steam containing SiC and SiO_(2)particles of the coating were studied.The results show that the surface hardness of the coating was(1400±50)HV,four times higher than that of Ti-6Al-4V titanium alloy.After erosion with SiC particles during a relatively short period or with SiO_(2)particles,the erosion mass loss of the coating increased with the increase of erosion angle,while that of the Ti-6Al-4V titanium alloy decreased.At the same erosion angle,the erosion mass loss of the coating increased with the increase of erosion particle hardness,and that of the Ti-6Al-4V titanium alloy followed this rule at relatively small erosion angles while changed little at relatively large erosion angles.