Transactions of Materials and Heat Treatment

Title：Design on isothermal die forging preform for 7050 aluminum alloy

Authors： Zhao Jiuhui Zhang Jin Chen Ming′an Deng Yunlai

Unit： Central South University

KeyWords： isothermal die forging Deform-3D aluminum alloy 7050 coupling shaft forging workpiece deformation degree

ClassificationCode：TG31

year,vol(issue):pagenumber：2017,42(4):8-13

Abstract：

Designing suitable forging preform is a prerequisite for the good comprehensive performance after forging. Therefore, a forging workpiece with good microstructure and properties is obtained by improving the preform dimension and the deformation degrees on its various positions. Then, the isothermal die forging processes of coupling shaft with different preform sizes were simulated by the finite element simulation software Deform-3D, and the equivalent strain of forging workpiece increased gradually with the increase of the thickness in the Z-direction. Furthermore, the preforms with better forming shape and gradual increase of forging deformation degree after forging were selected to test, and the isothermal die forgings after heat treatment were tested by the room temperature tensile, hardness, electrical conductivity, fatigue and metallographic tests. The experimental results show that the difference of performance in different positions of the forging workpiece is big for coupling shaft forging workpiece with abrupt change in the cross section along the long axis. After the isothermal die forging, better microstructure and mechanical properties of forging workpiece can be obtained by a larger deformation degree.

Funds：

国家重点基础研究发展计划（2012CB619500）；国家重点研发计划（2016YFB0300901）；国家自然科学基金资助项目（51375503）；广西重大专项计划（14122001-5）

赵久辉(1992-)，男，硕士研究生 E-mail：1582756504@qq.com 通讯作者：邓运来(1969-)，男，博士教授 E-mail：zjh_aluminium@163.com

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