Q235钢旋转电弧埋弧焊成形及组织
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摘要
在厚30 mm的Q235钢板上,利用缆式H10Mn2焊丝进行旋转电弧埋弧堆焊,探究焊接参数与焊缝熔深和熔宽之间的关系,研究了Q235钢旋转电弧埋弧焊成形及焊接接头微观组织。结果表明,控制好焊接电流、电弧电压和焊接速度能够极大地提高焊接效率。焊缝组织主要为细晶铁素体和粒状珠光体,其分布均匀,使焊缝具有良好的强度和韧性,但是较多的粒状珠光体会使焊缝区冲击韧性下降。当焊接速度较慢时,旋转电弧搅动熔池能力下降,夹杂物不能完全随焊渣浮出,导致夹杂产生。
The submerged rotating arc surfacing on 30 mm thick Q235 steel plate was carried out using cable type H10 Mn2 welding wire. The relationships between different welding parameters and welding depth and welding width were explored. The forming and microstructure of welded joint of submerged rotating arc welding of Q235 steel were studied. The results show that controlling welding current, arc voltage and welding speed can greatly improve the welding efficiency. The microstructure of the weld seam is mainly fine ferrite and granular pearlite, and its distribution is uniform, which makes the welding seam have good strength and toughness, but more granular pearlite can reduce the impact toughness of the weld zone.When the welding speed is slow, the stirring pool ability of the rotating arc reduces, and the inclusion can not completely float along with the welding slag, resulting in inclusions.
The submerged rotating arc surfacing on 30 mm thick Q235 steel plate was carried out using cable type H10 Mn2 welding wire. The relationships between different welding parameters and welding depth and welding width were explored. The forming and microstructure of welded joint of submerged rotating arc welding of Q235 steel were studied. The results show that controlling welding current, arc voltage and welding speed can greatly improve the welding efficiency. The microstructure of the weld seam is mainly fine ferrite and granular pearlite, and its distribution is uniform, which makes the welding seam have good strength and toughness, but more granular pearlite can reduce the impact toughness of the weld zone.When the welding speed is slow, the stirring pool ability of the rotating arc reduces, and the inclusion can not completely float along with the welding slag, resulting in inclusions.
引文
[1]方臣富,陈志伟,胥国祥,等.缆式焊丝CO2气体保护焊工艺研究[J].金属学报,2012,48(11):1299-1305.
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[3]杨克,杨可,包晔峰.Q345D钢埋弧焊接头组织与性能[J].电焊机,2014,44(1):87-90.
[2]王宗杰.熔焊方法及设备[M].北京:机械工业出版社,2006.
[3]杨克,杨可,包晔峰.Q345D钢埋弧焊接头组织与性能[J].电焊机,2014,44(1):87-90.