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发明授权
CN107236909B 可用于-60℃低温环境的高强度、高韧性耐腐蚀钢及其生产方法 有权

可用于-60℃低温环境的高强度、高韧性耐腐蚀钢及其生产方法
摘要：
本发明涉及可用于‑60℃低温环境的高强度、高韧性耐腐蚀钢及其生产方法，所述钢的组分及重量百分比含量为C：0.062％‑0.115％，Si：0.22％‑0.65％，Mn：0.82％‑2.05％，P：≤0.009％，S：≤0.001％，Als：0.100％‑0.280％，Nb：0.041％‑0.080％，Ti：0.090％‑0.135％，Ni：0.20％‑0.40％，Cr：0.40％‑1.40％。所述钢生产步骤：铁水脱硫；转炉冶炼；常规连铸并对铸坯加热；三阶段轧制；冷却。采用本发明，所得到的钢材的屈服强度≥620MPa，冲击韧性KV2≥100J并具有优良耐海水腐蚀性能，可以作为在北极等‑60℃低温海洋环境下使用并对强度、低温韧性、经济型及使用性能均有一定要求的船舶、海洋工程和海洋资源运输装备用钢。
摘要（英）：

The invention relates to high-strength and high-toughness corrosion-resistant steel capable of being used in a low-temperature environment of -60 DEG C, and a production method thereof. The steel comprises the following components with contents in percentage by weight: 0.062%-0.115% of C, 0.22%-0.65% of Si, 0.82%-2.05% of Mn, not greater than 0.009% of P, not greater than 0.001% of S, 0.100%-0.280% of Als, 0.041%-0.080% of Nb, 0.090%-0.135% of Ti, 0.20%-0.40% of Ni and 0.40%-1.40% of Cr. The production method of the steel comprises the following production steps: molten iron desulphurization, converter smelting, common continuous casting and heating for a casting blank, three-phase rolling and cooling. With the adoption of the production method disclosed by the invention, the obtained steel has a yield strength of not less than 620MPa, impact toughness KV2 of not less than 100J and excellent seawater corrosion resistance, and can be used as steel for ships, and marine engineering and marine resource transportation equipment used in a low-temperature marine environment of -60 DEG C such as the north pole and having requirements on strength, low-temperature toughness, economical efficiency and use performance to a certain extent.

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