NUMERICAL SIMULATION OF COLD PILGERING OF STAINLESS STEEL TUBES WITH COMPOSITE STRUCTURE
具有复合组织的不锈钢管周期轧制过程的数值模拟

A 3D finite element method is used to the simulation of cold pilgering process of 1Cr18Ni9Ti stainless steel tubes by using ANSYS software, which are cast by electromagnetic centrifugal casting (EMCC) and of the characteristic of composite structure. Simulation results show that during cold pilgering the better the axial plasticity of tubes, the smaller the shear stress *rz and the shear strain ?TZ, as well as the better the property of rolling deformation. Along with the decrease of the Coulomb friction coefficient not only the *rz and the ?rz are decreased, but also the discontinuity of *rz between outer columnar and inner equiaxied zone is decreased. Moreover, the property of rolling deformation and the quality of tubes are improved. With the increase of exciting currents, which enlarges equiaxed zone, not only the mechanical property of the tubes is improved, but also the *rz and the ?rz are decreased. Moreover, the property of rolling deformation and the quality of tubes are also improved. The simulation results agree well with the experiment.