Extrusion die for making extrusion billet for semi-solid forming and its reheating method

摘要

The invention reaction and to a method for re-heating the extruded billet is produced through an extrusion die and a die for the production of extrusion billets needed for molding.; According to the invention the extrusion die, the extrusion for the production of extrusion required for high reaction pressure for the continuous casting of billets is installed in the container with a punch forming the billet Thus, the inlet with which the continuously cast billet is introduced, the billet with the inlet but it has an outlet that exits the flow path towards the outlet from the inlet, and a reduced inner diameter at the inlet with a constant curvature going toward the outlet gradual arc-shaped ball-shaped inlet portion, one after another to said inlet having an inner diameter of more reduced outflow of the rib-shaped characterized in that the configuration portion.; And, according to the present invention a method for re-heating the extruded billet is prepared using the extrusion die, but re-heated to the extrusion temperature of billets 570 ~ 610 ℃, time to up to 800 seconds, and constant the heating time interval to be divided into the following, it characterized in that the heating by each different input power in the range 1 ~ 50㎾ in accordance with said time intervals.