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发明公开
CN103290186A 原油油船货油舱内底板用耐蚀钢板的制造方法及钢板 有权

原油油船货油舱内底板用耐蚀钢板的制造方法及钢板
摘要：
一种原油油船货油舱内底板用耐蚀钢板的制造方法及钢板，属于热轧平板船体结构用钢技术领域。通过板坯加热、板坯除鳞、轧制、ACC水冷和空气冷却的工艺及参数控制制造而成。其钢板以质量百分比计其化学成分为：C：0.02-0.25%，Si：0.05-0.5%，Mn：0.1-2.0%，P：≤0.025%，S：≤0.01%， Cu：0.05-2%，Ni：0.05-2%，W：0.001-1%，Zr：0.001-0.1%，Ti：0.005-0.1%， Als：0.020-0.1%，余量为Fe及不可避免的杂质。优点在于，可直接裸态使用于油轮货油舱下底板的建造，在高Cl-浓度、较低pH值的服役条件下具有优良的抗局部腐蚀能力，无需涂层保护，降低维修费用和有效延长舱体使用寿命。
摘要（英）：

The invention discloses a manufacturing method of a corrosion-proof steel plate used for a crude oil tanker cargo oil hold inner bottom plate and the steel plate, and belongs to the technical field of steels used for hot rolling flat-plate boat body structures. The method of manufacturing the corrosion-proof steel plate comprises the following steps of: heating a slab; descaling the slab; rolling; cooling by ACC (activated calcium carbonate) water; cooling by air; controlling parameters. The steel plate disclosed by the invention comprises the following chemical compositions in percentage by mass: 0.02-0.25% of C, 0.05-0.5% of Si, 0.1-2.0% of Mn, at most 0.025% of P, at most 0.01% of S, 0.05-2% of Cu, 0.05-2% of Ni, 0.001-1% of W, 0.001-0.1% of Zr, 0.005-0.1% of Ti, 0.020-0.1% of Als and the balance of Fe and inevitable impurities. The corrosion-proof steel plate disclosed by the invention has the advantages that the steel plate can be directly used for construction of the tanker cargo oil hold lower bottom plate in a bare state, has an excellent local corrosion resistance capability under the service conditions of a high concentration of Cl<-> and a low pH value, coating protection is not needed, the maintenance cost is reduced, and the service life of a hold body is effectively prolonged.

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