EP 0764063 B1 19990203 - METHOD OF PRODUCING A SEAMLESS HOT-FINISHED TUBE
Title (en)
METHOD OF PRODUCING A SEAMLESS HOT-FINISHED TUBE
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES NAHTLOSEN WARMGEFERTIGTEN ROHRES
Title (fr)
PROCEDE DE PRODUCTION D'UN TUYAU SANS SOUDURE FINI A CHAUD
Publication
Application
Priority
- DE 9500800 W 19950613
- DE 4422011 A 19940616
- DE 19520833 A 19950531
Abstract (en)
[origin: WO9534387A1] The invention concerns a method for the production of a seamless hot-finished tube from steel with reduced deformability, in particular roller-bearing steel, the method calling for a pretreated and degassed as well as deoxidized liquid steel of the required chemical composition to be continuously cast with any cross-section and, after separation of the billet, for the casting to be divided into suitable lengths and shaped. The invention calls for the cut lengths to be heated to the shaping temperature without any preshaping, i.e. as cast, and without any heat treatment (diffusion anealing), and fed to a tube-production plant.
IPC 1-7
IPC 8 full level
B21B 17/00 (2006.01); B21B 19/04 (2006.01); B21C 37/06 (2006.01); B21J 5/10 (2006.01); B22D 11/00 (2006.01); B22D 11/12 (2006.01); B22D 11/20 (2006.01); B21B 1/46 (2006.01); B21B 3/02 (2006.01); B21B 23/00 (2006.01); B21H 1/12 (2006.01)
CPC (source: EP)
B21B 19/04 (2013.01); B21C 37/06 (2013.01); B21J 5/10 (2013.01); B22D 11/00 (2013.01); B21B 1/466 (2013.01); B21B 3/02 (2013.01); B21B 23/00 (2013.01); B21H 1/12 (2013.01)
Designated contracting state (EPC)
AT BE DE ES FR IT SE
DOCDB simple family (publication)
WO 9534387 A1 19951221; AT E176411 T1 19990215; BR 9508017 A 19970902; CA 2192970 A1 19951221; CN 1062785 C 20010307; CN 1150767 A 19970528; CZ 364496 A3 19980318; EP 0764063 A1 19970326; EP 0764063 B1 19990203; ES 2128736 T3 19990516; JP H10505789 A 19980609; MX 9606085 A 19980531; PL 178838 B1 20000630; PL 317837 A1 19970428; SK 159796 A3 19970604; SK 282573 B6 20021008
DOCDB simple family (application)
DE 9500800 W 19950613; AT 95921715 T 19950613; BR 9508017 A 19950613; CA 2192970 A 19950613; CN 95193596 A 19950613; CZ 364496 A 19950613; EP 95921715 A 19950613; ES 95921715 T 19950613; JP 50147996 A 19950613; MX 9606085 A 19950613; PL 31783795 A 19950613; SK 159796 A 19950613