Global Patent Index - EP 1516935 A4

EP 1516935 A4 20060830 - METHOD FOR PRODUCING SEAMLESS STEEL PIPE FOR INFLATOR OF AIR BAG

Title (en)

METHOD FOR PRODUCING SEAMLESS STEEL PIPE FOR INFLATOR OF AIR BAG

Title (de)

VERFAHREN ZUR HERSTELLUNG EINES NAHTLOSEN STAHLROHRS FÜR DIE AUFBLASVORRICHTUNG EINES AIRBAGS

Title (fr)

PROCEDE DE PRODUCTION D'UN TUYAU EN ACIER SANS SOUDURE DESTINE A UN GONFLEUR POUR AIRBAG

Publication

EP 1516935 A4 20060830 (EN)

Application

EP 03733377 A 20030611

Priority

  • JP 0307435 W 20030611
  • JP 2002186550 A 20020626
  • JP 2002234367 A 20020812

Abstract (en)

[origin: EP1516935A1] The invention proposes a method for manufacturing a seamless steel pipe having high strength, high toughness, and high formability for an airbag. A method for manufacturing a seamless steel pipe comprising a process for manufacturing a raw material for steel pipe having a composition containing 0.01 to 0.10% of C, 0.5% or less of Si, 0.10 to 2.00% of Mn, more than 1.0% and 2.0% or less of Cr, and 0.5% or less of Mo to form the seamless steel pipe, a process for drawing the seamless steel pipe in cold working, and a quenching and tempering process for heating the seamless steel pipe to Ac3 transformation point or more and 1050 DEG C or less and then quenching, then tempering at 450 DEG C or more and Ac1 transformation point or less is proposed. A method for manufacturing a seamless steel pipe where the cold drawing process is replaced after the quenching and tempering process is proposed. The composition may further contain, in addition to the composition, one or two or more selected from 1.0% or less of Cu, 1.0% or less of Ni, 0.10% or less of Nb, 0.10% or less of V, 0.10% or less of Ti, and 0.005% or less of B.

IPC 1-7

C21D 9/08; C22C 38/00; C22C 38/38; C22C 38/58

IPC 8 full level

C21D 8/10 (2006.01); C22C 38/22 (2006.01); C22C 38/38 (2006.01); C21D 1/18 (2006.01); C21D 1/28 (2006.01)

CPC (source: EP US)

C21D 8/10 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/22 (2013.01 - EP US); C22C 38/38 (2013.01 - EP US); C21D 1/18 (2013.01 - EP US); C21D 1/28 (2013.01 - EP US)

Citation (search report)

  • [A] US 2002033591 A1 20020321 - ERIKE ERIC C [US]
  • [Y] PATENT ABSTRACTS OF JAPAN vol. 1997, no. 04 30 April 1997 (1997-04-30)
  • [Y] WEGST W ED - WEGST C W -: "Stahlschlüssel", STAHLSCHLUSSEL. NACHSCHLAGEWERK, MARBACH, VERLAG STAHLSCHLUSSEL WEGST, DE, vol. ED. 1989, 1989, pages 6 - 7, XP002095653
  • [DY] PATENT ABSTRACTS OF JAPAN vol. 1998, no. 10 31 August 1998 (1998-08-31)
  • [DY] PATENT ABSTRACTS OF JAPAN vol. 1998, no. 10 31 August 1998 (1998-08-31)
  • [A] SPIEKERMANN P: "LEGIERUNGEN - EIN BESONDERES PATENTRECHTLICHES PROBLEM? - LEGIERUNGSPRUEFUNG IM EUROPAEISCHEN PATENTAMT -", MITTEILUNGEN DER DEUTSCHEN PATENTANWAELTE, HEYMANN, KOLN,, DE, 1993, pages 178 - 190, XP000961882, ISSN: 0026-6884
  • See references of WO 2004003241A1

Designated contracting state (EPC)

DE FR IT

DOCDB simple family (publication)

EP 1516935 A1 20050323; EP 1516935 A4 20060830; CA 2476546 A1 20040108; MX PA04010403 A 20050217; US 2006070687 A1 20060406; WO 2004003241 A1 20040108

DOCDB simple family (application)

EP 03733377 A 20030611; CA 2476546 A 20030611; JP 0307435 W 20030611; MX PA04010403 A 20030611; US 51476504 A 20041117