摘要
对低合金超高强度钢（D406A）进行了光纤激光-电弧复合焊接,在最佳工艺参数条件下,研究了装配间隙对D406A焊接性能的影响.结果表明,装配间隙的最佳范围为0.6∽1.0 mm.另外在最佳工艺条件下,对焊缝形状、焊接接头组织、硬度及力学性能进行了研究.结果表明,焊缝金属可以分为电弧区、激光-电弧复合区及激光区,并且激光区与电弧区相比组织细小;3个区域的硬度分布最高值均出现在热影响区（HAZ）;经热处理后,焊接接头力学性能基本与母材相同.
The fiber laser-arc hybrid welding was conducted on low alloy high strength steel（ D406A）. The effect of fitup gap on the properties of D406 A low alloy high strength steel welding was studied under the optimal process conditions. The results showed that the optimal fit-up gap was ranged from 0. 6 to1. 0 mm. In addition,under optimum conditions,the shape of the weld,weld joint microstructure,hardness and mechanical properties was studied. The results indicated that weld metal can be divided into the arc zones,laser-arc hybrid zones and the laser zones. The microstructure of laser weld zones was tinier than the arc zones while the highest hardness of the three regions was in the heat affected zone（ HAZ）. After heat treatment,the mechanical properties of welded joint and base metal were nearly the same.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2015年第8期59-62,116,共4页
Transactions of The China Welding Institution
基金
辽宁省科技创新重大专项计划资助项目(201411004)
