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首页> 外文会议>Materials science and technology VII >The Effect of Ultrasonic Vibration on Properties of Weld Metal
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The Effect of Ultrasonic Vibration on Properties of Weld Metal

机译：超声波振动对焊接金属性能的影响

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摘要

Weld metal mechanical properties and weldability of materials are closely related to the microstructure of the weld metal. A significant amount of research has been studied to improve microstructure of weldments such as weld pool stirring by using magnetic arc oscillation and arc pulsation. In this work, the effect of ultrasonic vibration was used to modify weld metal solidification to improve microstructure of the weld metal. Microstructure and mechanical properties of carbon steel weld metal (ER70S-G filler metal) were studied. Filler metal was melted by using Gas Tungsten Arc Welding (GTAW) in a water-cooled copper mold. Ultrasonic vibration with a frequency of 20 kHz was applied during solidification of the weld metal. Microstructure and mechanical properties of weld metal were compared with those of conventional weld metal (no ultrasonic vibration assistance). Scanning Electron Microscopy (SEM) was also used to determine microstructure and phases at high magnification. The results showed that ultrasonic vibration applied during solidification promoted grain refinement in the weld metal. Mechanical properties of weld metal were improved significantly, microstructure analysis correlated well with the mechanical test results.
机译：焊接金属的机械性能和材料的可焊性与焊接金属的微观结构密切相关。已经进行了大量研究，以通过利用磁弧振荡和电弧脉动来改善焊件的微观结构，例如焊池搅拌。在这项工作中，利用超声波振动的作用来改善焊接金属的凝固，以改善焊接金属的微观结构。研究了碳钢焊接金属（ER70S-G填充金属）的组织和力学性能。通过在水冷铜模具中使用钨极氩弧焊（GTAW）来熔化填充金属。在焊接金属凝固过程中施加20 kHz的超声波振动。将焊接金属的组织和力学性能与常规焊接金属（无超声振动辅助）进行了比较。扫描电子显微镜（SEM）也用于确定高倍率下的微观结构和相。结果表明，凝固过程中施加的超声波振动促进了焊接金属的晶粒细化。焊缝金属的力学性能得到显着改善，显微组织分析与力学测试结果吻合良好。

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  • 来源
  • 会议地点 Bangkok(TH)
  • 作者

    Titinan Methong; Bovornchok Poopat;

  • 作者单位

    Department of Production Engineering, Faculty of Engineering, King Mongkut's University of Technology Thonburi, 126 Parcha u-tid Road, Bangmod, Thungkru, Bangkok, 10140 Thailand;

    Department of Production Engineering, Faculty of Engineering, King Mongkut's University of Technology Thonburi, 126 Parcha u-tid Road, Bangmod, Thungkru, Bangkok, 10140 Thailand;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Ultrasonic vibration; Grain refinement; Solidification of weld metal;

    机译：超声波振动；晶粒细化；焊缝金属凝固;

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