EP 1612291 B1 20080123 - Multistage continuous carburizing and quenching furnace and continuous carburizing and quenching method
Title (en)
Multistage continuous carburizing and quenching furnace and continuous carburizing and quenching method
Title (de)
Mehrstufiger Ofen und Verfahren zum kontinuierlichen Aufkohlen und Abschrecken
Title (fr)
Four mulit-étages et procédé pour la carburation en continue et la trempe
Publication
Application
Priority
JP 2004187556 A 20040625
Abstract (en)
[origin: EP1612291A1] A carburizing zone 11, a diffusion zone 12, and a temperature lowering zone 13 are sequentially disposed in a furnace. The furnace interior is divided into first- to fourth-stage carburizing furnace areas I to IV by first- to fourth-stage transport roller conveyors 14-1 to 14-4 and carrying-out roller conveyors 15-1 to 15-5. Heat treatment pallets 50 on which metallic materials are respectively placed are loaded into the respective carburizing furnace areas I to IV in accordance with a preset order of the carburizing furnace areas at an interval corresponding to a quenching cycle, so as to perform uniform carburizing without variations in the respective carburizing furnace areas I to IV. The heat treatment pallets 50 from temperature lowering zones 13-1 to 13-4 in the respective carburizing furnace areas I to IV are immersed in a quenching medium in a quenching zone 21 in the aforementioned order of the carburizing furnace areas, so as to perform uniform quenching without variations.
IPC 8 full level
C23C 8/20 (2006.01); C21D 9/00 (2006.01); C23C 8/80 (2006.01)
CPC (source: EP)
C21D 9/0062 (2013.01); C23C 8/20 (2013.01); C23C 8/80 (2013.01); F27B 9/025 (2013.01); F27B 9/20 (2013.01); C21D 9/0018 (2013.01); C21D 9/005 (2013.01); C21D 9/0056 (2013.01); F27B 9/38 (2013.01); F27D 2003/0065 (2013.01)
Designated contracting state (EPC)
DE FR
DOCDB simple family (publication)
EP 1612291 A1 20060104; EP 1612291 B1 20080123; DE 602005004448 D1 20080313; DE 602005004448 T2 20090115; JP 2006009087 A 20060112; JP 4540406 B2 20100908
DOCDB simple family (application)
EP 05013682 A 20050624; DE 602005004448 T 20050624; JP 2004187556 A 20040625