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Ti-6Al-4V超高频脉冲GTAW焊缝气孔分析

郑浩,杨明轩,杨舟,齐铂金

郑浩,杨明轩,杨舟,齐铂金. Ti-6Al-4V超高频脉冲GTAW焊缝气孔分析[J]. 焊接学报, 2017, 38(11): 37-40. DOI: 10.12073/j.hjxb.20151230001
引用本文: 郑浩,杨明轩,杨舟,齐铂金. Ti-6Al-4V超高频脉冲GTAW焊缝气孔分析[J]. 焊接学报, 2017, 38(11): 37-40. DOI: 10.12073/j.hjxb.20151230001

Ti-6Al-4V超高频脉冲GTAW焊缝气孔分析

  • 摘要: 以Ti-6Al-4V钛合金为母材金属进行焊缝气孔研究,试验发现与常规电弧焊接(conventional GTAW, C-GTAW)相比,超高频脉冲GTAW(ultra high frequency pulsed GTAW, UHFP-GTAW)具有较好的焊缝气孔清理效果,可有效减少甚至清除气孔缺陷. 结合UHFP-GTAW电弧行为对焊缝气孔形成的气泡长大、脱离熔池壁面、上浮逸出等三个阶段分别进行分析. 结果表明,在高频脉冲电弧作用下,气泡受压,有利于气泡核长大;表面张力变大,有利于附着气泡脱离熔池壁面;Ti-6Al-4V钛合金熔池粘度随温度升高而减小,气泡逸出速度随之增大,有利于降低焊缝气孔敏感性.
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  • 收稿日期:  2015-12-29

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