49MnVS3非调质钢的两种轧制力模型对比

Comparison of Two Rolling Force Models for 49MnVS3 Non-Quenched and Tempered Steel

对49MnVS3非调质钢在变形温度750~1 000℃、应变速率0.1~50s^(-1)下进行单道次热压缩试验,根据真应力-真应变曲线得到周纪华-管克智变形抗力模型;分别采用艾克隆德模型和周纪华-管克智变形抗力模型计算49MnVS3非调质钢的平均单位轧制压力,并对计算结果进行了比较。结果表明:随着应变的增加,基于艾克隆德模型和周纪华-管克智变形抗力模型计算得到的平均单位轧制压力均增大;基于艾克隆德模型得到的平均单位轧制压力曲线波动较小,而基于周纪华-管克智变形抗力模型的波动则较大;在低应变速率下,基于艾克隆德模型计算得到的平均单位轧制压力较大,而在高应变速率下,基于周纪华-管克智变形抗力模型计算得到的平均单位轧制压力较大;基于周纪华-管克智变形抗力模型计算轧制力时,需要借助热模拟试验数据,该模型适用于控制模型;艾克隆德模型只需使用化学成分和轧制工艺参数即可计算平均单位轧制压力,应用更广泛,该模型适用于轧制工艺设计。

Single pass hot compression tests were conducted on 49MnVS3 non-quenched and tempered steel at deformation temperatures of 750-1 000 ℃ and strain rates of 0.1-50 s^-1,and the Zhou Jihua-Guan Kezhi deformation resistance model was obtained according to the true stress-true strain curves.The average unit rolling pressure of 49MnVS3 non-quenched and tempered steel were calculated by Aiklund model and Zhou Jihua-Guan Kezhi deformation resistance model,respectively,and the calculated results were compared.The results show that the average unit rolling pressures calculated by Aiklund model and Zhou Jihua-Guan Kezhi deformation resistance model increased with the increase of strain.The fluctuation of average unit rolling pressure curve calculated by Aiklund model was relatively small,while the fluctuation by Zhou Jihua-Guan Kezhi deformation resistance model was relatively large.The average unit rolling pressure calculated by Aiklund model was relatively large at low strain rate,and that calculated by Zhou Jihua-Guan Kezhi deformation resistance model was relatively large at high strain rate.When calculating the rolling force by Zhou Jihua-Guan Kezhi deformation resistance model,the data obtained from the thermal simulation test was required,and the model was suitable for controlling model.The Aiklund model calculated the average unit rolling pressure with chemical composition and rolling process parameters;the model was applied relatively widely and suitable for rolling process design.