摘要
钢材的淬硬倾向、焊接接头含氢量及其分布,以及接头所承受的拘束应力状态是产生焊接冷裂纹的三大主要因素。对于低淬硬倾向的钢材,采用低氢型焊材,合理设计焊接结构,降低接头的拘束应力状态,通过合理的焊接工艺,可以消除浮头式换热器浮头盖焊接时出现的焊接冷裂纹。
Harden tendency of steel, content and distribution of hydrogen in welded joints, restraint stress resistance of joints are three factors that leads to the cold cracks of the welded joints. For low harden tendency steel, the welding cold cracks appeared in the floating head of floating-head type heat exchanger can be eliminated by adopting low hydrogen weld- ing materials, rational welding structure decreasing the restraint stress of the joints and suitable welding procedure.
出处
《焊接》
北大核心
2006年第9期57-59,共3页
Welding & Joining
关键词
焊接冷裂纹
拘束度
结构设计
焊接坡口
welding cold crack, restraint degree, design of structure, welding groove
