49MnVS3非调质钢的两种轧制力模型对比
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摘要
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.
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.
引文
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[2]邓园园.GCr15高速线材轧制力模型及控制冷却技术研究[D].重庆:重庆大学,2014.
[3]ZHANG Y X,ZHANG H O,WANG G L,et al.Application of mathematical model for microstructure and mechanical property of hot rolled wire rods[J].Applied Mathematical Modelling,2009,33(3):1259-1269.
[4]MANSOURI N,MIRHOSSEINI M,SABOONCHI A.Thermal modeling of strip across the transfer table in the hot rolling process[J].Applied Thermal Engineering,2012,38(1):91-104.
[5]YU F,HAO Y.Application of mathematical modeling in twostage rolling of hot rolled wire rods[J].Journal of Materials Processing Technology,2014,214(9):1962-1970.
[6]王伟.非调质钢空心件三辊楔横轧成形过程有限元研究[D].秦皇岛:燕山大学,2009.
[7]张毅,张华,程晓茹.中厚板轧制力数学模型的研究[J].钢铁研究,2005,33(4):18-21.
[8]卢建宏.棒材轧机力能参数采集及数学模型研究[D].武汉:武汉科技大学,2004.
[9]郭振华.基于轧制生产数据的变形抗力模型构建方法[D].秦皇岛:燕山大学,2011.
[10]刘娟,陈雨来,江海涛.60Si2Mn弹簧钢的热变形抗力及其数学模型[J].机械工程材料,2011,35(11):44-46.
[11]王健,王宇,谢红飙,等.基于热连轧实测数据的金属材料变形抗力模型[J].塑性工程学报,2015,22(1):55-60.
[12]李小龙,周敦世,冯亮.GCr15轴承钢130 mm棒材热连轧过程轧制力的数值模拟和分析[J].特殊钢,2015,36(1):5-8.
[13]苑阳阳,张炯明,肖超,等.49MnVS3非调质钢连铸方坯中心裂纹分析[J].北京科技大学学报,2012,34(8):892-897.
[14]LUO Y Z,ZHANG J M,LIU Z M,et al.In situ observation and thermodynamic calculation of MnS in 49MnVS3 nonquenched and tempered steel[J].Acta Metallurgica Sinica(English Letters),2011,24(4):326-334.
[15]MA M T,LI G Z,LI Z G,et al.The effect of morphology and distribution of sulfides on mechanical properties and fatigue life of non-quenched and tempered steel[J].Advanced Materials Research,2008,742(51):11-20.