高频脉冲大电流深熔MAG焊接工艺研究  

Research on high-frequency pulse accompained by large current deep penetration MAG welding technology

作　　者：张猛 陈庆城 徐晓萍 冯文虎 ZHANG Meng;CHEN Qingcheng;XU Xiaoping;FENG Wenhu(CSSC Guangzhou Shipyard International Co.,Ltd.,Guangzhou 511462,Guangdong,China)

机构地区：[1]广船国际有限公司,广东广州511462

出　　处：《金属加工（热加工）》2024年第8期66-72,共7页MW Metal Forming

摘　　要：将高频脉冲大电流深熔MAG焊接工艺应用在船舶中厚板角接坡口,实现坡口背面不清根全焊透焊接。针对V形与K形坡口的横焊、平焊位置采用不同的焊接技术条件,分析大电流深熔MAG焊的熔透性及力学性能。通过研究可知:高频脉冲大电流双面深熔MAG焊接技术及V形坡口横焊位置大电流单面焊双面成形技术,焊缝成形良好,超声波检测、宏观金相、冲击性能及硬度均满足船级社的规范要求,可减少焊缝根部的碳弧气刨及打磨量,降低人工成本,提高施工进度,避免焊缝金属的多次加热,提升焊缝接头的可靠性。单面焊双面成形技术应用在V形坡口平焊及K形坡口平焊、横焊均难以实现焊缝成形;坡口背面粘贴陶瓷衬垫时,焊缝中心易出现应力集中现象,产生焊接裂纹。The high frequency pulse accompained by large current deep penetration MAG welding technology is applied to the angle bevel of the ship thick plates,which to achieve full penetration without back gouging.The penetration and mechanical properties of the technology are analyzed by using different welding conditions for transverse and horizontal welding positions of V-bevel and K-bevel.According to the research:two kinds of welding techniques proved effective.One is high-frequency pulse with large current double-side deep penetration MAG welding technology,another is V-bevel transverse welding position with high-current single-side welding doubleside forming technology.Both of them could formed well,and the results of ultrasonic flaw detection,macro metallography,impact toughness,hardness values could be met the requirements of classification society.It not only reduce the amount of carbon arc gouging and grinding,reduce labor cost,improve construction schedule,but also avoid multiple heating of weld metal and improve the reliability of weld joint.However,high-current singleside welding double-side forming technology applied to V-bevel flat welding or K-bevel flat welding or K-bevel transverse welding,none of them could formed under the condition of ceramic backing pasted on the back of the bevel,the stress concentration is easy to occur in the center of the weld,resulting in welding cracks.

关 键 词：大电流 MAG焊 深熔焊 

分 类 号：U671.83[交通运输工程—船舶及航道工程] TG457.11[交通运输工程—船舶与海洋工程]