摘要
试验对比分析了2次、4次以及6次返修焊对S355J2W+N焊接接头疲劳性能的影响。结果表明,焊接返修次数增加会使接头疲劳寿命降低,6次返修的接头中值疲劳寿命与未经返修的接头相比降低43%。疲劳试样断裂位置分为在焊缝处断裂和在母材处断裂,断口均明显分成裂纹源区、裂纹扩展区和最后断裂区3部分。
Effects of repair-time on fatigue properties of S355J2W＋N steel welded joint are studied in experiment,and the results show that the fatigue life-span decreases with the increase of repair-time.The fatigue life-span with 6repairing times reduce by 43% decrease comparing with that of nonrepair.The fractured positions are in weld joint and base metal respectively,and the fractured surface is divided into three zones which are crack source zone,crack propagation zone and fracture zone.
出处
《长春工业大学学报》
CAS
2015年第5期577-583,共7页
Journal of Changchun University of Technology
基金
长春轨道客车股份有限公司科研开发项目
