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82问答网 > 340-550铸钢与Q345B钢板焊接用什么型号焊丝好。跪谢

340-550铸钢与Q345B钢板焊接用什么型号焊丝好。跪谢

焊接点受力很大。一米的圆管柱和铸钢件相连接.全部受力越500吨

2025-03-25 02:53:50

推荐回答（2个）

回答1：

GB/T 7659-2010中介绍ZG340-550H的强度在550MPa以上，但是Q345B的强度在500MPa以上，所以本着就低的原则，就用常见的50焊丝即可，但是一定要保证焊接质量，不允许有超标的缺陷，尤其是你这种受力大的，最好焊完做热处理，消除或降低工件的应力。
希望我的回答对你有用，如果满意请点击采纳~

回答2：

按Q345选焊丝：ER49-1或ER50-2。这是异种钢焊接，焊丝应按强度低的钢选取，而工艺措施（如预热等）应按强度高的钢来选取。

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