文档介绍：钢结构焊接国际论坛 IFWT 2006
自动 MAG 焊接大熔深高低强钢异材组合的
缺陷控制研究
余洋郭鹏杨家林樊亚丽
(中物院机械制造工艺研究所)
摘要:在对 D6A 高强度钢与 20 钢异种材料的焊接组合时,通常采用的焊接方法是手工 TIG 焊
接,目前已经能较好的解决焊缝的内部缺陷,但是手工 TIG 焊接带来一系列的问题,最突出的
问题是生产效率低下,工人劳动强度大,不易于连续生产作业。因此急需寻求一种焊接方法来
解决手工 TIG 焊存在的这些问题。
本项目的研究建立在机器人自动 MAG 焊接的基础上,采用这种焊接方法可显著提高生产
效率,降低劳动者的劳动强度,但同时由于焊接方法的不同,又带来一系列新的问题:MAG 焊
接方法金属熔敷量大,焊缝内部容易产生气孔等缺陷;同时容易造成应力集中,而产生延迟裂
纹。本文重点探讨了焊接缺陷的产生原因并提出了解决措施,取得良好效果。
关键词:自动 MAG 焊接高低强钢异材组合缺陷控制
Abstract:In welding D6A steel and 20 steel,mon way is by hand-TIG method. And it could
be good quality by this method. But series problems caused by hand-TIG weld and the outstanding
ings are low productivity,high labor intensity and difficult continuous producing. It's
necessary to find a new welding method to resolve these ings.
This research based on the auto-robot MAG welding method,it can improve productivity,but the
changes of method causes another series problems. Because of the large melted metal,gas holes,stress
concentration are easily emerged in the joint and the stress concentration can cause the delay-cracks.
This article discussed how to reduce these defects and get a good result.
Key words:MAG antomation welding,High and low strength steels,Dissimilation materials conbination,
Defects control
0 前言
在对 D6A 超高强度钢和 20 钢异种材料组合焊接时,通常的方法是采用手工 TIG 焊接
方法,目前已能较好的解决焊缝内部缺陷,但手工 TIG 焊接的生产效率低,工人劳动强度