| 张艳芳,王东坡,董磊磊.超声冲击处理改善X80管线钢环焊缝接头疲劳性能研究[J].装备环境工程,2023,20(6):92-97. ZHANG Yan-fang,WANG Dong-po,DONG Lei-lei.Fatigue Performance Improvement of X80 Pipeline Steel Girth Weld Joints by Ultrasonic Impact Treatment[J].Equipment Environmental Engineering,2023,20(6):92-97. |
| 超声冲击处理改善X80管线钢环焊缝接头疲劳性能研究 |
| Fatigue Performance Improvement of X80 Pipeline Steel Girth Weld Joints by Ultrasonic Impact Treatment |
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| DOI：10.7643/issn.1672-9242.2023.06.012 |
| 中文关键词: X80管线钢 超声冲击处理 疲劳寿命 环焊缝接头 残余应力 疲劳试验 S-N曲线中图分类号:TG172 文献标识码:A 文章编号:1672-9242(2023)06-0092-06 |
| 英文关键词:X80 pipeline steel ultrasonic impact treatment fatigue life girth weld joint residual stress fatigue test S-N curve |
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| 中文摘要: |
| 目的 验证超声冲击处理(UIT)对X80钢管环缝焊接接头疲劳性能的延寿效果。方法 分别开展X80管线钢GMAW自动焊环缝超声冲击前后的疲劳试验，根据国际焊接学会(IIW)的规范处理试验数据，并对结果进行对比。结果 稳定地控制管道内壁焊根区域的显微未熔合等焊接缺陷，是保证X80管线钢环焊缝具有优异抗疲劳性能的关键延寿途径之一。采用最大应力固定为屈服强度+全厚度小尺寸试件的焊接接头疲劳试验方法能够替代足尺寸或全尺寸焊接结构疲劳试验，也适用于评价超声冲击处理焊接接头的疲劳性能。在严格控制错边量的前提下，X80管线钢GMAW环缝可以达到BS7608 D级设计曲线要求。结论 超声冲击处理可以显著提高X80管线钢环缝接头的疲劳性能，大约延长疲劳寿命4~10倍左右。 |
| 英文摘要: |
| The work aims to verify the effect of ultrasonic impact treatment (UIT) on the fatigue performance of X80 steel pipe girth weld joints. To this end, fatigue tests with and without UIT for GMAW automatic girth welds of X80 pipeline steel were performed. The test data were processed following IIW’s recommendations, and the results were compared. The test results showed that:stable control of welding defects such as microscopic lack of fusion in the weld root area of the pipeline’s inner wall was one of the key life-extension methods to ensure that the X80 pipeline steel girth weld had an excellent fatigue performance; The adopted fatigue test method for welded joints with the maximum stress being the yield strength combined with small-sized but full-thickness specimens can replace the fatigue test of full-scale or real-scale specimens, and was also suitable for evaluating the fatigue performance of ultrasonic impact treated welded joints; With a strict control of error variables, the GMAW girth welds of X80 pipeline steel could meet the requirements of level-D design curve of the BS7608 guide. Based on this study, it’s concluded that the UIT technique can significantly improve the fatigue performance of X80 pipeline steel ring seam joints, with the fatigue life extended by about 4 to 10 times. |
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