EP 1894641 A4 20090701 - ROLL FOR ROLLING SEAMLESS PIPES
Title (en)
ROLL FOR ROLLING SEAMLESS PIPES
Title (de)
WALZE ZUM WALZEN VON NAHTLOSEN ROHREN
Title (fr)
ROULEAU POUR LAMINAGE DE TUYAUTERIES SANS SOUDURES
Publication
Application
Priority
- JP 2006310563 W 20060526
- JP 2005155922 A 20050527
Abstract (en)
[origin: EP1894641A1] A roll for rolling a seamless pipe or tube according to the invention includes a roll neck portion and a roll barrel portion. The surface layer of the roll barrel portion includes, by mass, 1.5% to 2.5% C, 1.3% to 3.5% Si, 0.1% to 2.0% Mn, 0.5% to 8.0% Ni, 0.1% to 2.0% Cr, 0.2% to 5.0% Mo, 0.1% to 5.0% V, 0.1% to 5.0% W, 0.1% to 5.0% Nb, and 0.05% to 2.0% Co, the balance consisting of Fe and impurities, and graphite having an area ratio of 0.5% to 5.0%. Therefore, the roll according to the invention has high wear resistance and a good biting characteristic.
IPC 8 full level
B21B 27/02 (2006.01); B21B 19/04 (2006.01); C22C 37/00 (2006.01); C22C 38/00 (2006.01); C22C 38/58 (2006.01)
CPC (source: EP)
B21B 27/025 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); C22C 38/48 (2013.01); C22C 38/52 (2013.01); B21B 19/04 (2013.01); B21B 27/024 (2013.01); B21B 27/035 (2013.01); B21B 27/037 (2013.01); B21B 2267/26 (2013.01)
Citation (search report)
- [AD] JP H1081937 A 19980331 - TAIHEIYO SEIKO KK, et al
- [A] JP 2004250729 A 20040909 - JFE STEEL KK
- [A] EP 0816521 A2 19980107 - KAWASAKI STEEL CO [JP], et al
- See references of WO 2006126678A1
Designated contracting state (EPC)
DE FR
DOCDB simple family (publication)
EP 1894641 A1 20080305; EP 1894641 A4 20090701; EP 1894641 B1 20110622; BR PI0611407 A2 20100908; BR PI0611407 B1 20190709; JP 4710904 B2 20110629; JP WO2006126678 A1 20081225; WO 2006126678 A1 20061130
DOCDB simple family (application)
EP 06746892 A 20060526; BR PI0611407 A 20060526; JP 2006310563 W 20060526; JP 2007517919 A 20060526