Transactions of Materials and Heat Treatment

Title：Key factors affecting material deformation in high speed cold roll-beating of large modulus splines

Authors： Niu Ting Li Yongtang Qi Huiping Zhang Jinhui Wang Limin

Unit： Jinzhong University Taiyuan University of Science and Technology Shanxi Key Laboratory of Metal Forming Theory and Technology Qingdao Production and Construction Machinery Factory

KeyWords： high speed cold roll-beating forming passes microstructure grain refinement ultra-fine grain

ClassificationCode：TG386

year,vol(issue):pagenumber：2021,46(8):109-116

Abstract：

In order to simplify the process parameters and break through the influences of test conditions on the study of process parameters, through the analysis of forming principle, it was concluded that the inertial force caused by high speed rotating roller was the material deformation force, and the strain rate of material was affected by the rotation speed of roller. Then, by analyzing the deformation characteristics of deformation zone, it is concluded that the high speed cold roll-beating belonges to multi-pass forming, and the roll-beating passes are determined by the rotation speed of roller and the feeding speed of workpiece. Furthermore, by analyzing the distribution conditions of grain sizes in different passes, the influence of roll-beating passes on microstructure is revealed. When the passes of roll-beating are about 16-22, the average grain sizes are in the ultra-fine grain range, but when the passes of roll-beating are about 30-36, the proportion of ultra-fine grains reaches 90%. After determining roll-beating passes, the value ranges of rotation speed for roller and feeding speed for workpiece were determined according to the relationship between passes and process parameters, so as to guide the actual production.

Funds：

国家自然科学基金资助项目（51475316）；山西省高等学校科技创新项目（2019L0891，2019L0888，2020L0580）

牛婷（1986-），女，博士，讲师 E-mail：niuting861010@163.com

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