CONTINUOUS EQUAL CHANNEL ANGULAR PRESSING METHOD AND MOLD BEING USED FOR THE SAID METHOD, AND MANUFACTURING APPARATUS WITH THE ABOVE MOLD

摘要

The present invention continuously shears the metal material in the mold with the same cross-sectional area or cross-sectional shape over the entire length, such as wire / shape / square material / plate, to minimize the grain size in the metal structure and improve the mechanical properties, especially process automation. The present invention relates to a continuous steel confinement shear deformation method and a mold used in the method and a metal material processing apparatus including the mold.;In the mold according to the present invention, in the ECAP process mold in which the inlet / outlet of the same shape intersects at an arbitrary angle, the inner curved surface and the outer curved surface at the intersection where the inlet / outlet of the mold continues continuously satisfy the following relational expression. Characterized in that.;(Relationship: Conditional Expression);Φ: the angle at which the two passages intersect;Ψ = angle of surface arc at the edge of passage intersection;Ψinner = Φ (where 0≤ radius of inner curved arc R≤ 1/6 of channel (inlet / outlet) width);0≤ angle of outer curved arc from center point P≤ 22 °;In addition, the metal material processing apparatus provided by the present invention is characterized in that the inlet and outlet of the mold is provided with a ram for pressing the metal material, respectively, and the heat generating means for applying heat to the mold is further provided.;In addition, the continuous steel constant shear deformation method proposed by the present invention in the steel constant shear deformation method of pressing the metal material into the mold having the same cross-sectional shape as the metal material, the metal material for pushing the metal material to the inlet of the mold Feeding step; A primary deformation step of forcing the metal material pushed into the inlet of the mold in the metal material supplying step with a ram (upper ram) to be forced to the exit of the mold; A secondary deformation step of forcing the back of the metal material forcedly transferred to the outlet of the mold in the first deformation step with a ram (force) and forcibly transferring it to the inlet of the mold; An iterative deformation step of repeatedly applying the primary deformation step and the secondary deformation step; And a discharging step of removing the metal material from the mold after completion of the repeated deformation step.