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发明授权
CN106756517B 一种用于极地船舶的钢板及其制造方法 有权

一种用于极地船舶的钢板及其制造方法
摘要：
本发明公开了一种用于极地船舶的钢板及其制造方法，该钢板包含具有如下重量百分比的组分：C 0.02%~0.13%，Si 0.80%~1.2%，Mn 0.30%~1.00%，Cr 0.40%~1.00%，Ni 0.05%~0.40%，P＜0.010%，S＜0.005%，Ti 0.01%~0.10%，Mo＜0.60%，Cu 0.10%~0.80%，Al 0.01%~0.06%，Nb 0.003~0.06%，V 0~0.08%，余量为Fe和不可避免的杂质元素。本发明的钢板能够用于超低温度，韧性优异，其屈服强度≥315MPa，抗拉强度≥510 MPa，在‑60℃~‑80°C低温环境下夏比冲击功≥200 J，在‑60℃下CTOD断裂韧性值≥0.25mm，在‑60℃~‑80°C低温环境下焊接接头冲击功≥64 J，焊接性能优异。
摘要（英）：

The invention discloses a steel plate for a polar region ship and a manufacturing method of the steel plate. The steel plate comprises, by weight percentage, 0.02%-0.13% of C, 0.80%-1.2% of Si, 0.30% --1.00% of Mn, 0.40%-1.00% of Cr, 0.05%-0.40% of Ni, less than 0.010% of P, less than 0.005% of S, 0.01%-0.10% of Ti, less than 0.60% of Mo, 0.10%-0.80% of Cu, 0.01%-0.06% of Al, 0.003%-0.06% of Nb, 0-0.08% of V and the balance Fe and inevitable impurity elements. The steel plate can be used at ultralow temperature, the toughness is excellent, the yield strength of the steel plate is larger than or equal to 315 MPa, the extension strength of the steel plate is larger than or equal to 510 MPa, the Charpy impact energy is larger than or equal to 200 J in the environment with the lower temperature ranging from -80 DEG C to -60 DEG C, the CTOD breaking tenacity value is larger than or equal to 0.25 mm at the -60 DEG C, the welding connector impact power is larger than or equal to 64 J in the environment with the lower temperature ranging from -80 DEG C to -60 DEG C, and the welding performance is excellent.

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