Hot deformation behaviour and Hansel-Spittel constitutive model of Cr5 alloy for heavy backup roll

Xuewen Chen, Nana Wang, Xiang Ma, H. Zhou
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引用次数: 7

Abstract

The heavy backup roll is a key component in large steel rolling production line, as it supports the work roll to prevent any excessive deflection. The backup rolls are traditionally produced by large-scale forging process. To accurately describe the high temperature flow behaviour of a newly developed roll material Cr5 alloy for numerical forging simulation, a thermal simulation testing machine, Gleeble-1500D, is used in this work. The isothermal compression experiments are carried out to study the flow behaviour of Cr5 alloy at temperature range of 900 to 1,200°C, and strain rate range of 0.005/s to 5/s. Hansel-Spittel model is thus used to establish the constitutive equation of the material under hot deformation. The accuracy of the constitutive equation is analysed by using correlation coefficient r. The validation shows that this equation can accurately predict the thermal deformation behaviour Cr5 alloy. The Hansel-Spittel model is implemented into the Forge software, and the FE simulation of a compression process is compared favourably with the experimental data.
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重型轧辊用Cr5合金热变形行为及Hansel-Spittel本构模型
重型支承辊是大型轧钢生产线的关键部件,它支撑工作辊,防止工作辊过度偏斜。支承辊传统上是通过大型锻造工艺生产的。为了准确描述用于数值锻造模拟的新型轧辊材料Cr5合金的高温流动行为,本工作使用了热模拟试验机Gleeble-1500D。通过等温压缩实验研究了Cr5合金在900~1200°C温度范围和0.005/s~5/s应变速率范围内的流动行为。因此,利用Hansel-Spittel模型建立了材料在热变形下的本构方程。利用相关系数r对本构方程的精度进行了分析,验证了该方程能够准确预测Cr5合金的热变形行为。在Forge软件中实现了Hansel-Spittel模型,并将压缩过程的有限元模拟与实验数据进行了比较。
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CiteScore
1.20
自引率
0.00%
发文量
3
期刊介绍: IJCMSSE is a refereed international journal that aims to provide a blend of theoretical and applied study of computational materials science and surface engineering. The scope of IJCMSSE original scientific papers that describe computer methods of modelling, simulation, and prediction for designing materials and structures at all length scales. The Editors-in-Chief of IJCMSSE encourage the submission of fundamental and interdisciplinary contributions on materials science and engineering, surface engineering and computational methods of modelling, simulation, and prediction. Papers published in IJCMSSE involve the solution of current problems, in which it is necessary to apply computational materials science and surface engineering methods for solving relevant engineering problems.
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