Transactions of Materials and Heat Treatment

Title：Flow model of free spread in threeroll passes of rod

Authors： Chang Binbin Shuai Meirong Liu Xin

Unit： Taiyuan University of Science and Technology

KeyWords： three-roll passes plastic strain flowing law free spread flow model cross-sectional area of outlet

ClassificationCode：TG335.6

year,vol(issue):pagenumber：2021,46(11):207-214

Abstract：

The three-roll forming of rod has the characteristics of achieving temperature-controlled continuous rolling in a short time and accumulating large deformation under the action of alternative stress, and it is especially suitable for continuous forming of metal with narrow deformation temperature range and high deformation resistance. Therefore, the study on the law of metal plastic deformation has an important influence on the stability of continuous rolling, accurate forming of product and excellent comprehensive performance. Then, during the three-roll continuous rolling process, the plastic strain and the flow law in the roll gap area of TC4 titanium alloy rod were studied by the numerical simulation method, and combined with the calculation formula of pass spread, the free spread flow model of metal particles in the roll gap area of different pass systems was further reconstructed, which could accurately characterize the geometric contours of deformable body and the cross-sectional area of outlet. Furthermore, the continuous rolling tests of TC4 titanium alloy rod were carried out on the three-roll mill, and the dimensional accuracy of sample from the experimental results was in good agreement with the simulation results. Thus, the established free spread flow model could effectively improve the forming stability and yield of rod continuous rolling to provide the theoretical basis for the preparation of high-performance materials.

Funds：

山西省重点研发计划(201903D121043)；山西省重点研发计划重点项目(201703D11103)；山西省应用基础研究计划(201901D211312)

作者简介：常彬彬（1995-)，女，硕士研究生，E-mail：1935879895@qq.com；通信作者：帅美荣(1978- )，女，博士，教授，E-mail：ruoxin2001@163.com

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