辛立军,林三宝,刘旭平,陈明华,伍复发.脉冲激光-电弧复合焊接镁合金过程中熔池行为与气孔产生的关系研究[J].稀有金属材料与工程,2020,49(6):1894~1900.[辛立军,Lin Sanbao,Liu Xuping,Chen Minghua,Wu Fufa.Relationship between molten pool behavior and keyhole-induced porosity in pulsed laser-arc hybrid welding of magnesium alloy[J].Rare Metal Materials and Engineering,2020,49(6):1894~1900.]
脉冲激光-电弧复合焊接镁合金过程中熔池行为与气孔产生的关系研究
投稿时间:2019-02-25  修订日期:2019-04-03
中文关键词:  镁合金,熔池,激光-电弧复合焊接,气孔,激光匙孔
基金项目:the National Natural Science Foundation of China (Grant Nos 51571006 and 51805236), the Natural Science Foundations of Liaoning Province (Nos. JQL201715402 and 20180510.40) and the Program for Liaoning Distinguished Professor.;哈尔滨工业大学先进焊接与连接国家重点实验室开放项目
中文摘要:
      激光-电弧复合焊接镁合金过程中气孔是一种重要缺陷。本文针对复合热源焊接过程中熔池行为和激光匙孔引起的气孔之间的关系进行了实验研究。研究中重点考查了激光脉冲对熔池的冲击作用,匙孔的动态行为以及气孔的形成规律。研究结果表明激光脉冲的参数决定其对液态熔池的冲击作用,较强的激光脉冲作用可以有效抑制气孔的形成;液态金属的行为主要有匙孔行为主导;匙孔的尺寸和开-闭状态直接影响焊后气孔的形成;过高的激光脉冲功率会导致焊后气孔的形成;匙孔开口维持时间越长,焊后气孔数量越少。
Relationship between molten pool behavior and keyhole-induced porosity in pulsed laser-arc hybrid welding of magnesium alloy
英文关键词:magnesium alloy, molten pool, laser-arc welding, porosity, laser keyhole
英文摘要:
      The porosity is an important kind of weld defects in deep-penetration laser-arc welds. This paper gives an Experimental study on relationship between molten pool behavior and keyhole-induced porosity in pulsed laser-arc hybrid welding. In this research, the impact effect of laser pulse on the weld pool, and live behavior of the laser keyhole and the porosities in the weld were investigated in detail. Results show that the impact effects from the laser pulse depend on the laser pulse parameters and stronger impact effect helps restrain the porosity formation. The laser keyhole state dominants the welding pool behavior. The keyhole dimension and open-close state directly influences the porosity formation. Extremely high laser pulse power always brings about porosities after welding. Lengthening the laser keyhole opening time and giving the gas enough time to escape will be an effectively way to restrain the porosity.
作者单位E-mail
辛立军 辽宁工业大学材料科学与工程学院 eva3456@163.com 
林三宝 哈尔滨工业大学先进焊接与连接国家重点实验室  
刘旭平 中国石油天然气股份有限公司锦州石化分公司  
陈明华 辽宁工业大学材料科学与工程学院  
伍复发 辽宁工业大学材料科学与工程学院哈尔滨工业大学先进焊接与连接国家重点实验室  
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