航空科学技术2023，Vol.34Issue(12)：43-58,16.DOI:10.19452/j.issn1007-5453.2023.12.006
超声冲击强化工艺对钛合金表面质量及磨损性能影响研究
Research on the Effect of Ultrasonic Impact Strengthening on the Surface Property and Wear Properties of Titanium Alloy
摘要
Abstract
The poor wear resistance of titanium alloys severely limits their application in the aerospace field.In order to study the mechanism of improving wear resistance of Ti-6Al-4V(TC4)titanium alloy after ultrasonic impact strengthening,ultrasonic impact strengthening test of Ti-6Al-4V(TC4)titanium alloy was conducted.The influence rule and sensitivity of ultrasonic impact treatment process parameters(tool diameter,air float table pressure,impact pass,tool head shape,feed step)on the surface quality and performance of titanium alloy were investigated.It was found that when the ball head tool was used,the pressure of air float table was 0.45MPa,and the feed step was 0.3mm,the ultrasonic impact strengthening had the most obvious improvement on the wear resistance of titanium alloy.Through the study and analysis of the tribological test results such as friction coefficient,ball grinding spot diameter,disk wear rate and surface topography,it is found that the wear resistance of titanium alloy after ultrasonic impact strengthening treatment is improved by the joint action of compressive stress suppression crack mechanism,surface hardening strengthening mechanism and gully oil storage mechanism.The actual enhancement effect of ultrasonic impact treatment on the wear resistance of titanium alloy was verified.关键词
超声冲击处理/钛合金/表面组织特性/摩擦学特性Key words
ultrasonic impact treatment/titanium alloy/surface microstructure properties/tribological properties分类
航空航天引用本文复制引用
董宝昆,张宇航,行登海,隋天一,闫帅,林彬..超声冲击强化工艺对钛合金表面质量及磨损性能影响研究[J].航空科学技术,2023,34(12):43-58,16.基金项目
航空科学基金(20180748004) Aeronautical Science Foundation of China(20180748004) （20180748004）
