Transactions of Materials and Heat Treatment

Title：Study on isothermal split-die precision forging process of complicated forging of high strength aluminum alloy

Authors： Lin Jun Kang Feng Hu Chuankai Chen Qiang Hao Yuanyuan Zhao Zude

Unit： National Research and Application Centre of Precision Forming Technology No.59 Institute of China Ordinance Industry

KeyWords： split-die forging isothermal forming fold preform numerical simulation

ClassificationCode：TG319

year,vol(issue):pagenumber：2015,40(5):52-58

Abstract：

For a complicated forging of high strength aluminum alloy, the isothermal split-die forging process dealing with final forging, preforming and flatting was numerically simulated by the coupled thermo-mechanical finite element method (FEM) based on process analysis. The FEM results show several folds have been formed in the final forging due to unreasonable geometric shape of preform. The forming mechanism causing those folds was obtained by finite element simulation with plane strain model. The design principle of the complicated preform forging was given in the split-die forging process, and its geometry was optimized. The experimental results show that the forged piece which manufactured by the new preform and forming process is perfect without any defects, and the overall quality indexes of forged piece, such as dimensional accuracy and surface roughness, are better than that produced by typical open-die forging process.

Funds：

国防科技工业技术基础项目（C102013C003）

林军（1980-），男，博士，高级工程师

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