焊接工艺参数对不锈钢搭接焊缝成形的影响  

Effect of Welding Parameters on Stainless Steel Lap Weld Formation

作　　者：毕学松 李志波 高文国 尚鹏 BI Xuesong;LI Zhibo;GAO Wenguo;SHANG Peng(Tangshan Kaiyuan Welding Automation Technology Institute Co.,Ltd.,Tangshan 063000,China;Innovation Center of Hebei Province for Welding Automation Equipment SystemTechnology,Tangshan 063000,China)

机构地区：[1]唐山开元焊接自动化技术研究所有限公司,河北唐山063000 [2]河北省焊接自动化装备系统技术创新中心,河北唐山063000

出　　处：《热加工工艺》2024年第11期49-52,共4页Hot Working Technology

基　　金：河北省重点研发计划项目(22341801D);河北省科技研发平台建设专项项目(215676109H)。

摘　　要：针对MARKⅢ型LNG薄膜舱的主屏壁波纹板焊接特点及要求,采用等离子弧焊接方法,在立向上位置改变主要焊接工艺参数开展系列试验,研究工艺参数对304L不锈钢搭接焊缝成形的影响规律。结果表明,电弧峰值电流、脉冲频率和离子气流量等电弧参数以及电弧长度、焊枪指向位置对焊缝成形有明显影响;焊缝成形良好的工艺参数范围为:峰值电流70~95 A,基值电流30 A,脉冲频率4~6 Hz,离子气流量0.20~0.35 L/min,电弧长度d1在0.8~1.4mm,焊枪指向位置d2为-0.3~0.3 mm。这为开发自动化焊接设备提供了理论基础。According to the welding characteristics and requirements of corrugated plate of main screen wall of MARKⅢLNG membrane tank,a large number of plasma arc welding process tests were carried out by changing main welding process parameters at vertical upward position,and the influence of process parameters on 304L stainless steel lap weld formation was studied.The results show that the arc parameters such as arc peak current,pulse frequency and ionic gas flow,as well as arc length and torch pointing position have a significant impact on the weld formation.The range of process parameters for good weld formation is the peak current of 70-95 A,the base current of 30 A,the pulse frequency of 4-6 Hz,the ion gas flow rate of 0.20-0.35 L/min,the arc length of 0.8-1.4 mm,and the welding torch pointing position of-0.3-0.3 mm.The experimental results provide a theoretical basis for the development of automatic welding equipment.

关 键 词：膜围护系统 等离子弧焊 搭接接头 焊接参数 

分 类 号：TG456.2[金属学及工艺—焊接]