B - Operations – Transporting – 30 – B
Patent
B - Operations, Transporting
30
B
B30B 11/22 (2006.01) B21C 23/00 (2006.01) B21C 23/01 (2006.01) B21C 23/20 (2006.01) B21C 23/21 (2006.01) B21J 1/00 (2006.01) C22F 1/00 (2006.01) C22F 1/047 (2006.01) C22F 1/08 (2006.01) C22F 1/10 (2006.01)
Patent
CA 2160842
To provide a hot working method which can reduce working resistance during the early stage of hot plastic working, particularly extrusion and forging using a die. A hot plastic working method characterized by comprising the step of plastically working, using a die, a material having a structure of not more than 50 µm in average grain diameter with dispersed spherical grains ranging in size from 10 to 200 nm, the working material having a recess formed on a surface thereof in its site facing a closed space formed by abutting the working material against the die surface at the time of plastic working.
Cette invention concerne une méthode de travail à chaud permettant de réduire la résistance au façonnage en début de déformation plastique à chaud, en particulier par extrusion et matriçage. La méthode de déformation plastique à chaud comprend une étape de façonnage plastique d'un matériau dont le diamètre moyen des grains ne dépasse pas 50 micromètre et comportant des grains sphériques dispersés dont la taille varie entre 10 et 200 nm, le matériau étant creusé du côté faisant face à un espace fermé obtenu en l'aboutant contre la matrice au moment de la déformation plastique.
Miyake Yoshiharu
Serizawa Yoshihisa
Gowling Lafleur Henderson Llp
Toyota Jidosha Kabushiki Kaisha
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