STEEL PIPE FOR AIR BAG AND PROCESS FOR PRODUCING SAME

Title:

STEEL PIPE FOR AIR BAG AND PROCESS FOR PRODUCING SAME

Document Type and Number:

WIPO Patent Application WO/2011/151908

Kind Code:

A1

Abstract:

Provided is a steel pipe for air bags which is reduced in alloy cost and has a tensile strength of 1,000 MPa or higher and a vTrs100 of -80ºC or less. A process for producing the steel pipe is also provided in which the number of softening/annealing treatments in the cold drawing step can be minimized. Stable properties can be obtained even through quench hardening conducted by mass-scale high-frequency heating. The steel pipe has a steel composition which contains, in terms of mass%, 0.05-0.20% C, 0.10-0.50% Si, 0.10-1.00% Mn, up to 0.025% P, up to 0.005% S, 0.005-0.10% Al, 0.0005-0.0050% Ca, 0.005-0.050% Nb, 0.005-0.050% Ti, 0.01-0.50% Cu, 0.01-0.50% Ni, 0.01-0.50% Cr, 0.0005-0.0050% B, and 0.002-0.010% N, with the remainder comprising Fe and incidental impurities.

Inventors:

ARAI YUJI (JP)
TAKANO TAKASHI (JP)
KAWAMOTO TAKUMA (JP)

Application Number:

PCT/JP2010/059417

Publication Date:

December 08, 2011

Filing Date:

June 03, 2010

Export Citation:

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Assignee:

SUMITOMO METAL IND (JP)
ARAI YUJI (JP)
TAKANO TAKASHI (JP)
KAWAMOTO TAKUMA (JP)

International Classes:

C22C38/00; C21D7/10; C21D9/08; C22C38/54

Domestic Patent References:

WO2006046503A1	2006-05-04
WO2004104255A1	2004-12-02
WO2002079526A1	2002-10-10

Foreign References:

JPH10212549A	1998-08-11
JP2010132999A	2010-06-17
JP2004076034A	2004-03-11
US20060169368A1	2006-08-03

Other References: