Transactions of Materials and Heat Treatment

Title：Repetitive forging process for pure copper

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ClassificationCode：TG316.3

year,vol(issue):pagenumber：2020,45(4):21-27

Abstract：

Deformation behavior, velocity field, load, effective strain and the effect of process route on effective strain during repetitive forging (RF) of pure copper were investigated by using DEFORM software. The results show that the rotation of sample whose ratio of height to width is one occurs at the initial stage during the first forging with inclined punch. Then the shear deformation along longitudinal direction is produced between the left and right sides of sample. Finally, the cavity is filled.While, the material initially flows along the horizontal direction during the first reverse forging with flat punch. Then the shear deformation along longitudinal direction is produced between the left and right sides of sample. Finally, the cavity is filled. The above deformation processes would lead to inhomogeneous deformation in the sample. The higher effective strain is located at the top and bottom surfaces of sample and the lower effective strain is at the both sides during RF with route A. The effective strain level and deformation homogeneity can be improved during RF with route B. The experimental studies show that ultra-fine grains can be obtained by four passes RF with route B.

Funds：

江苏省高等学校大学生实践创新训练计划项目（201910289061Y）

张健伟（1998-），男，本科生 E-mail：3490364303@qq.com 通讯作者：石凤健（1977-），男，博士，副教授 E-mail：shifengjian@126.com

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