超声冲击处理对Ti17合金表面修复的研究  

Study of Surface Repairing for Til7 Alloy by Ultrasonic Impact Treatment

作　　者：焦磊[1] 许飞[1] 张娟[1] 

机构地区：[1]西北有色金属研究院材料分析中心,西安710016

出　　处：《材料导报（网络版）》2012年第1期33-35,共3页Materials Review

摘　　要：以电火花表面处理后的Ti17合金为基材，采用超声处理对材料表面进行修复，测试修复前后材料的表面粗糙度、硬度和疲劳性能的变化。结果表明，超声冲击处理可使电火花处理后的Ti17合金的表面粗糙度由Ra=578gin降低到Ra=43μm。超声冲击对材料的影响在靠近表层40gin以内。超声冲击修复处理使电火花表面处理后试样的疲劳寿命提高了1倍以上．Abstract Sur fsces of Til 7 alloy was strengthened by an electric spark treatment （EST）, then the ultrasonic impact treatment （UTT） was used to repair surfsce quulity Surfsce roughness, surfsce hardness and fatigue lifes were test. The results show tliut surfsce roughness was reduced after UTT, fiom Ra 5.78μm to Ra 5.78μm. The effect of UTT on surfsce of TilT alloy was within 40gin, the fstigue life of the specimens repaired by UIT is about twice the life oftlie specimens without UTT.

关 键 词：超声冲击 表面粗糙度 硬度 疲劳性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]