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发明公开
CN105671436A 抗高温PWHT软化的低焊接裂纹敏感系数原油储罐用高强韧性钢板及其制造方法 有权 转让

抗高温PWHT软化的低焊接裂纹敏感系数原油储罐用高强韧性钢板及其制造方法
摘要：
本发明公开了一种抗高温PWHT软化的低焊接裂纹敏感系数原油储罐用高强韧性钢板及其制造方法，所述钢板的化学成分按质量百分比含量包括：C：0.07％-0.12％、Si：0.15％-0.30％、Mn：1.40％-1.60％、S≤0.010％、P≤0.015％、Mo：0.05％-0.15％，Ni：0.20％-0.35％，Nb：0.015％-0.035％、V：0.030％-0.060％、Ti：0.010％-0.030％，Alt：0.015％-0.045％，O≤0.0030％，N 0.0020％-0.0045％，H≤0.00015％，其余为Fe和不可避免的微量杂质。本发明的原油储罐用钢板在具有高强韧性、抗高温PWHT软化性能的同时，还具有较低的焊接裂纹敏感系数和再热裂纹敏感系数，适合10万m3-15万m3大型原油储罐建造。
摘要（英）：

The invention discloses a high-toughness steel plate with high-temperature PWHT softening resistance and a low welding crack sensitivity coefficient for a crude oil storage tank and a manufacturing method of the high-toughness steel plate. The steel plate comprises the following chemical components in percentage by mass: 0.07-0.12% of C, 0.15-0.30% of Si, 1.40-1.60% of Mn, less than or equal to 0.010% of S, less than or equal to 0.015% of P, 0.05-0.15% of Mo, 0.20-0.35% of Ni, 0.015-0.035% of Nb, 0.030-0.060% of V, 0.010-0.030% of Ti, 0.015-0.045% of Alt, less than or equal to 0.0030% of O, 0.0020-0.0045% of N, less than or equal to 0.00015% of H and the balance Fe and unavoidable trace impurities. The steel plate for the crude oil storage tank also has a relatively low welding crack sensitivity coefficient and a relatively low reheating crack sensitivity coefficient while having high toughness and high-temperature PWHT softening resistance and is suitable for constructing 100000-150000m<3> large crude oil storage tanks.

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