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发明公开
CN108247234A 一种高强度钢用埋弧焊丝及其制备方法 有权

一种高强度钢用埋弧焊丝及其制备方法
摘要：
本发明公开了一种高强度钢用埋弧焊丝及其制备方法，属于焊丝领域。所述焊丝的化学成分按重量百分比为：C：0.05～0.09，Mn：0.6～1，Si≤0.10，P＜0.01，S≤0.005，Cu：0.5～1，Ni：0.5～1，Cr：0.3～0.5，Mo：0.1～0.2，Ti：0.03～0.05，B：0.0025～0.005，其余为铁和不和避免的杂质，该焊丝同时还满足Ti/B：9～11，Ni/Cu＞1。通过本发明所提供的高强度钢用埋弧焊丝的制备方法而获得的埋弧焊丝对钢构件进行焊接以后，该钢结构经过520～650℃回火后的焊缝的抗拉强度大于或等于700MPa，‑20℃冲击功平均值大于120J，且回火后的低温韧性比较稳定。
摘要（英）：

The invention discloses a submerged arc welding wire for high-strength steel and a preparing method of the wire, and belongs to the field of welding wires. The welding wire comprises chemical components including, by weight percent, 0.05 to 0.09% of C, 0.6 to 1% of Mn, not larger than 0.10% of Si, smaller than 0.01% of P, not larger than 0.005% of S, 0.5 to 1% of Cu, 0.5 to 1% of Ni, 0.3 to 0.5% of Cr, 0.1 to 0.2% of Mo, 0.03 to 0.05% of Ti, 0.0025 to 0.005% of B and the balance iron and inevitable impurities. The welding wire meets the formula that Ti/B:9-11, and Ni/Cu is larger than 1. Through the preparing method of the submerged arc welding wire for high-strength steel, the obtained submerged arc welding wire is welded with a steel component, the steel structure is subject to temperingat the temperature of 520 to 650 DEG C, the tensile strength of a welding line is larger than or equal to 700MPa, -20 DEG C ballistic work average value is larger than 120 J, and the low-temperaturetoughness after tempering is relatively stable.

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