| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for eliminating low strain range in the axial part of a material, in a twist-extruding method with which the internal structure of a material can be fined by applying very large working strain to the solid material and the powdery material of metal or high polymer, etc. SOLUTION: In a working method, with which the method charged into a container fixed so as not to rotate, is pushed in with a pusher and deformed while rotating a die around the extruding axis, this twist-extrusion working method has the peculiarity, in which a part of the material in the container is made to be of high temperature, and a part thereof is made to be of low temperature, and thus, the temperature distribution in the cross sectional faces of the material, is made to be unbalanced and this material is worked. Since the deformation of the material is not symmetrized to the axis with this method, the large strain can be developed even at the axial part. COPYRIGHT: (C)2005,JPO&NCIPI
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