不同焊接热输入下B610CF与16MnR异种钢焊接接头性能分析
Properties of B610CF and 16MnR Steel Welded Joint in Different Weld Heat Input
张天顺1， 张天会1， 李华英1， 闫沛军2
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作者单位：（1. 云南农业大学 工程技术学院，云南 昆明 650201；2 . 水电十四局，云南 昆明 650001）
中文关键字：B610CF钢； 16MnR； 焊接接头； 焊接热输入
英文关键字：B610CF steel；16MnR steel；welded joint；weld heat input
中文摘要：采用混合气体保护焊，对新开发的低焊接裂纹敏感性钢B610CF与16MnR钢进行对接焊，试验研究了不同焊接热输入下焊接接头的微观组织和力学性能。结果表明，随着焊接热输入的增大，使焊缝区贝氏体含量下降，而且晶粒变粗大，但对两侧热影响区组织影响不明显；焊缝区的冲击性能明显下降，但对两侧热影响区冲击性能以及焊接接头的强度和塑性影响不明显。
英文摘要：Weld heat input is an important factor, which can affect the micrographic structure and mechanical properties of different weld heat joints. The influences of weld heat input on the welded joint between B610CF and 16MnR steel using mixed active gas arc welding method were investigated by metallographic experiments and mechanical property experiments. The metallographic experimental results show that with the increase of weld heat input, the quantity of bainite decreases and the crystalline grain is larger; but in both B610CF and 16MnR steel heat affected zone, there is no distinct difference in microstructure. The mechanical property experimental results show that with the increase of weld heat input, the impact toughness decreases, but in both B610CF and 16MnR heat affected zone, there is less difference in impact toughness; and there is no distinct difference in tensile strength and plasticity of the welded joint.