EP 4039382 A4 20220810 - PIPE MEMBER MANUFACTURING METHOD
Title (en)
PIPE MEMBER MANUFACTURING METHOD
Title (de)
VERFAHREN ZUR HERSTELLUNG VON ROHRMATERIAL
Title (fr)
PROCÉDÉ DE FABRICATION D'ÉLÉMENT TUYAU
Publication
Application
Priority
- JP 2020203105 A 20201208
- JP 2021001208 W 20210115
Abstract (en)
[origin: EP4039382A1] To provide a technique that reduces an amount of energy consumption at manufacture of a pipe material having a high strength and improves a recyclability of the manufactured pipe material.First, a long, solid raw material made of a steel material containing 0.05 to 0.25 weight% C is prepared. Subsequently, the prepared raw material is cut to form a solid billet. After that, the solid billet is processed into a hollow blank 920. Then, warm extrusion molding is performed on the hollow processed blank 920 to be molded in a tubular shape.
IPC 8 full level
B21C 23/01 (2006.01); B21C 23/00 (2006.01); B21C 23/08 (2006.01); B21C 29/00 (2006.01); B21J 5/10 (2006.01); C21D 7/00 (2006.01)
CPC (source: EP)
B21C 23/001 (2013.01); B21C 23/002 (2013.01); B21C 23/01 (2013.01); B21C 23/085 (2013.01); B21C 29/003 (2013.01); B21J 5/10 (2013.01); C21D 1/32 (2013.01); C21D 7/00 (2013.01); C21D 7/02 (2013.01); C21D 8/105 (2013.01); C21D 9/08 (2013.01)
Citation (search report)
- [XY] CN 106694768 B 20180508
- [XY] DE 1247118 B 19670810 - IND DE PREC MARTII I P M S A
- [A] FR 786940 A 19350914 - SCHLOEMANN AG
- [Y] US 2012325364 A1 20121227 - KOCHI TAKUYA [JP], et al
- [Y] JP 5629598 B2 20141119
- See references of WO 2022123798A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 4039382 A1 20220810; EP 4039382 A4 20220810; EP 4039382 B1 20230809; CN 114916223 A 20220816; JP 2022090676 A 20220620; JP 7010441 B1 20220126; WO 2022123798 A1 20220616
DOCDB simple family (application)
EP 21777922 A 20210115; CN 202180001662 A 20210115; JP 2020203105 A 20201208; JP 2021001208 W 20210115