年产280万吨2250热轧带钢生产线设计 毕业设计(论文)说明书.doc

 HEBEI UNITED UNIVERSITY 毕业设计说明书 GRADUATE DESIGN 设计题目：年产280万吨2250热轧带钢生产线设计 学生姓名： 专业班级：09成型2班 学 院：冶金与能源学院 指导教师： 2013年6月5日 摘 要 板带钢是钢铁产品的主要品种之一，广泛应用于工业，农业，交通运输和建筑业。宽带钢在我国国民经济中的发展中需求量很大。世界各国近年来都在注重研制和使用连铸连轧等新技术和新设备来生产板带钢。我国冷轧/热轧比只能达到50%左右。要想加快冷轧板带钢的发展，就要保证热轧机能够提供优质的原料。 本设计任务按照2250热轧带钢生产线工艺要求，设计年产280万吨2250热轧带钢生产线，产品规格厚度为10mm。选择250mm厚坯，产品范围1.2~25.4mm，产品要求品种广泛，质量上乘。 论文主要内容包括：原料的选择、生产工艺的制定包括轧钢机的形式选择及布置，机架数目确定工艺的设计和辅助设备选择。并对典型品种进行压下规程设计和计算，验算轧辊强度和电机能力，绘制工艺平面图。 为了能生产高质量的热卷，轧制时对中间坯的厚度、凸度、表面光洁度都有较高要求，对温度有更严格的制度。采取辊道边部加热、层流边部遮挡，保证热卷产品残余应力小。采用新型板凸度仪，高效处理凸度信息，实现凸度、平直度自动控制，做到表面光洁，尺寸精度高，为后续冷轧提供合格带卷。 关键词 2250热轧带钢；车间布置；轧制规程；强度校核 Abstract The steel plate and strip is one of the main types of steel product,which is widely used in industry,agriculture,transportation and construction industry. The wide strip steel is largely needed in the development of our nation economy. Recent years, the countries around world are laying stress on developing and applying Continue Casting Direct Rolling(CCDR) and other new techniques and equipments to produce the steel plate and strip. The percentage of cold-rolling and hot-rolling in our country can only reach 50% or so. For our country to accelerate the development of cold and hot rolling,will ensure the hot-rolling machine to provide abundant high quality raw materials. This graduation project is designed on the requirement of the hot strip 2250s production line ,which is devising to produce 280 tons of hot strip 2250s production line annually. The specification of product will be 10mms thick . The thick stock of this product should be 250mm,ranging from 1.2mm to 24.5mm.The product will be high quality and in varieties. The main content of the dissertation includes the option of raw materials,the constitution of the production process which comprises the selection of the rolling machine’s type and arrangement,and the quantity of the frames and ancillary equipment. The content states the calculating and design of rolling schedule to typical