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CN101597673A 一种低合金高强度厚钢板的减量化制造方法 无效 - 驳回

一种低合金高强度厚钢板的减量化制造方法
摘要：
一种低合金高强度厚钢板的减量化制造方法，属于特厚钢板轧制工艺的技术领域。控制的工艺参数为：轧制工艺：加热温度1150～1180℃，出炉温度设在1080～1130℃，加热速度控制在0.8～0.9mm/min，轧制工艺采用奥氏体再结晶区轧制，终轧温度950～1050℃；轧后冷却工艺：采用层流冷却，终冷温度650～750℃，冷却速率3～10℃/s。优点在于：特厚板添加适量Mn，不添加其它合金元素，大大降低了生产成本；轧制不须采用控制轧制，每块钢板可节约轧制时间1～3分钟，节省能源，加快了生产节奏；综合性能：屈服强度σs：300－360MPa，抗拉强度σb：500－550MPa，断后伸长率δ5≥26％，－20℃冲击功AKv≥50J，冷弯性能合格。
摘要（英）：

The invention relates to a reduce production method of low-alloy and high-strength thick steel plate, belonging to the technical field of super-thick steel plate rolling technology. The controlled technological parameters are as follows: rolling technology: heating temperature ranges from 1150 DEG C to 1180 DEG C, tapping temperature is controlled to range from 1080 DEG C to 1130 DEG C, the heating speed ranges from 0.8mm/min to 0.9mm/min, Austenite recrystallization zone rolling is adopted as the rolling technology, and the final rolling temperature ranges from 950 DEG C to 1050 DEG C; cooling process after rolling: laminar cooling is adopted, final cooling temperature ranges from 650 DEG C to 750 DEG C, the cooling rate ranges from 3 DEG C/s to 10 DEG C/s. The method of the invention has the advantages that moderate amount of Mn is added to the super-thick plate, no other alloy element is added, as a result, production cost is greatly reduced; the rolling does not need to adopt controlled rolling, thus each steel plate can save 1-3 minutes of rolling time, the energy is saved, and the production rhythm is speeded up; the comprehensive properties are as follows: yield strength sigmas is 300-360MPa, tensile strength sigmab is 500-550MPa, percentage elongation delta5 is greater than or equal to 26%, ballistic work AKv at the temperature of minus 20 DEG C is greater than or equal to 50J, cold gagging property is qualified.

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