热轧碳钢流动应力的数学模型

An Mathematical Model of Flow Stress for Hot Strip Mill

采用恒应变速率凸轮塑性计,对生产现场所采集的9个碳钢的实体样本进行压缩试验,测定了热轧条件下的流动应力。选用了7种不同结构型式的流动应力数学模型,对试验数据做了回归分析,得到了较全面反映碳钢中主要化学元素和诸变形条件对流动应力影响的数学模型,此模型的结构优于现有模型,已用于生产的在线控制,效果良好。

Compress experiments on 5139 samples of nine grades of carbon steel which were collected from 1700 hot strip mill in WISC were made by a cam plastometer with constant strain rate, the flow stresses of carbon steels measured. Seven appropriate types of flow stress mathematical models were chosen to make regression analyses of these experimental data. A new - mathematical model was obtained in wfich the influences of main chemical elements in carbon steel and deformation conditions were fully considered. The structure and effect of new mathematical model are better than that of being used and it has been successfully used for on-line production control of 1700 hot strip mill in WISC.