摘要
为了提高不锈钢焊接性能，提出了一种旋转双焦点激光-惰性气体钨极保护焊（tungsten inert gas，TIG）复合焊接方法，该方法通过旋转的两束激光与电弧进行旁轴复合。运用自行设计的旋转双焦点激光-TIG复合焊接头对304^#不锈钢进行了工艺试验，并分析了焊缝的组织和性能。结果表明，在旋转双焦点激光-TIG复合焊接过程中，焊接电流和激光功率的有效耦合是影响焊缝组织的关键因素，而旋转频率的大小对焊缝的组织形成以及显微硬度都有非常重要的关系，低速旋转时可以引起焊缝的多次重熔，因此使得组织细小，硬度较高。该结果可用于指导激光-TIG复合焊接技术的理论分析及其实验研究。
In order to improve the property of stainless steel welding, a rotary double-focus laser-tungsten inert gas （TIG） hybrid welding technique was proposed, in which the rotary double-laser beam and the TIG arc were applied in welding at the same time. The rotary double-focus laser-T IG hybrid welding torch was designed, and a detailed experiment of rotary double-focus laser-TIG hybrid welding on the 304^# stainless steel plate with different welding parameters was carried out. The results showed that the hybrid function between the double-focus laser and arc was the main factors affecting the microstructure of welded joint, and that the rotation frequency affected the microstructure and micro-hardness of welded joint, the lower the rotary frequency, the higher the hardness because of smaller microstructure induced by re-melting of the welding line. The results are applicable in theoretical analysis and experimental research of laser-TIG hybrid welding technique.
出处
《激光技术》
CAS
CSCD
北大核心
2009年第6期593-596,共4页
Laser Technology
基金
国防"十一五"预研资助项目
