棒材轧制圆-椭圆-圆孔型中轧件面积计算模型  

Analytical Model for Cross-Sectional Area of Workpiece in Round-Oval-Round Pass Sequence in Bar Rolling

作　　者：姚俊[1] 唐广波[1] 刘正东[1] 马宝国[2] 

机构地区：[1]钢铁研究总院结构材料研究所,北京100081 [2]宝山钢铁股份有限公司特殊钢分公司,上海200940

出　　处：《钢铁》2009年第7期47-49,70,共4页Iron and Steel

基　　金："十一五"国家科技支撑计划项目(2006BAE03A08;2006BAE03A04)

摘　　要：对GCr15轴承钢在圆-椭圆-圆孔型轧制后的横截面积进行了计算,并根据棒材生产线上的现场数据,考虑轧制速度对宽展的影响,通过使计算道次延伸率与实际值误差的标准差最小对现有模型中的宽展修正系数进行了优化,使轧后横截面积的计算值与实际值误差在±3%以内,说明模型具有较高的精度,可以为轧制GCr15轴承钢时的孔型设计和轧制工艺设定提供参考。The cross-sectional areas of workpiece for GCr15 bearing steel in round-oval-round pass sequence have been investigated according to the industrial data from a hot bar rolling mill. The correction coefficient of spread in groove in the cross-sectional area model has been optimized by adopting the influence factor of rolling speed on spread to minimize the standard deviation between the calculated pass elongation rates and the actual valves. Deviations between the calculated pass elongation rates using the optimized analytical model and the actual values are less than ±3% which indicates the modified model can be used as a meaningful reference for the roll pass design and process control of hot bar rolling production of GCr15 bearing steel.

关 键 词：棒材轧制 GCR15 横截面积 

分 类 号：TG335.6[金属学及工艺—金属压力加工]