Transactions of Materials and Heat Treatment

Title：Stress analysis on wedge rolling of big cross-sectional area shrinkage

Authors： Shi Weisen Deng Ziyu Mu Honghong

Unit： Shenyang Ligong University

KeyWords： cross wedge rolling big cross-sectional shrinkage stress crack

ClassificationCode：

year,vol(issue):pagenumber：2014,39(10):72-76

Abstract：

The wedge rolling process of big cross-sectional area shrinkage solid part was simulated by deform-3D. The symmetric rolling of two-pieces in one mould was adopted，which improved the rolling efficiency. The distribution laws of axial stress in axial cross- sectional area and tangential stress of central cross-sectional area were researched. The influence of different rolling temperatures and rolling speeds on central temperature were analyzed. The results show that the speed has a great influence on the central temperature. The flow speed of deformed metal in rolling area increases with the increasing rolling speed，and the deformation work is transformed to heat energy, which causes the rising of central temperature significantly. The changing situations of mean stress in the central cross-sectional area were analyzed according to tracking points. The direction of tangential stress and mean stress are changed in the central cross-sectional area at same time. The results indicate that the area from the center of radius to the surface is the most likely area to product crack during cross wedge rolling.

Funds：

施伟森（1989-），男，硕士研究生

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