Transactions of Materials and Heat Treatment

Title：Finite element simulation of cross expanding process for metallurgical composite bimetallic seamless steel pipes

Authors： Zhang Gencheng Ma Xu Zhang Chuanyou Liu Jiangcheng

Unit： Tianjin University of Technology Tianjin Engineering Center of Near-Net-Shape Forming Technology for Metallic Materials Tianjin Pipe Manufacture Co. Ltd.

KeyWords： hollow bimetallic tube cross expanding metallurgical composite finite element simulation

ClassificationCode：TG135.3

year,vol(issue):pagenumber：2016,41(3):48-53

Abstract：

The cross expanding process of the hollow bimetallic tube was simulated successfully by finite element method (FEM) under reasonable feed angle and toe angle, and the distributions of rolling force, equivalent plastic strains and temperature for hollow bimetallic tube in the deformation zone were studied. The results show that the maximum rolling force happens in the expanding zone of the stable expanding stage where the defect appears easily for inner and outer layer material of the hollow bimetallic tube. However, the high temperature inside the workpiece is advantageous to the deformation of the interface between inner and outer layer material in coordination. Furthermore, the metallographic image and SEM image show the good interfacial metallurgical bonding in the interface of bimetallic seamless steel pipes, and the feasibility of cross expanding of hollow bimetallic tubes is verified.

Funds：

国家自然科学基金资助项目（50975295）；天津市科技支撑重点项目（12ZCZDGX00600）

张根成（1992-），男，硕士研究生

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