HIGH-STRENGTH COLD-ROLLED STEEL SHEET EXCELLENT IN WELDABILITY AND PROCESS FOR PRODUCTION OF SAME

WIPO Patent Application WO/2010/016430

A1

Provided are a high-strength cold-rolled steel sheet which has a TS of 440MPa or above and excellent weldability and which neither forms humping beads even when subjected to high-speed plasma welding and nor brings about deterioration in the workability of a tailored blank, and a process for production of same.  A high-strength cold-rolled steel sheet which has a TS of 440MPa or above and excellent weldability, characterized by having a composition which contains by mass C: 0.0005 to 0.005%, Si: 0.1 to 1.0%, Mn: 1 to 2.5%, P: 0.01 to 0.2%, S: 0.015% or less, sol. Al: 0.05% or less, N: 0.007% or less, Ti: 0.01 to 0.1%, B: 0.0005 to 0.0020%, Cu: 0.05 to 0.5%, and Ni: 0.03 to 0.5% with the balance being Fe and unavoidable impurities and a ferrite single phase structure.

JP4803210	Manufacturing method of fine-grain hot-rolled steel sheet
JPS63241116	MANUFACTURE OF HIGH STRENGTH RESISTANCE WELDED STEEL TUBE HAVING SUPERIOR SULFIDE CRACKING RESISTANCE
WO/2017/170611	NB-CONTAINING FERRITIC STAINLESS STEEL SHEET AND MANUFACTURING METHOD THEREFOR

YOSHIDA HIROMI (JP)
SAITO HAYATO (JP)
YOKOTA TAKESHI (JP)
TANAKA YASUSHI (JP)

PCT/JP2009/063622

February 11, 2010

July 24, 2009

Click for automatic bibliography generation  

JFE STEEL CORP (JP)
YOSHIDA HIROMI (JP)
SAITO HAYATO (JP)
YOKOTA TAKESHI (JP)
TANAKA YASUSHI (JP)

C22C38/00; B21B3/00; C21D9/46; C22C38/16; C22C38/60

JPH07188772A	1995-07-25
JPH06212276A	1994-08-02
JPH06100980A	1994-04-12
JPH08291364A	1996-11-05
JPS61246344A	1986-11-01
JPH01149943A	1989-06-13
JPH02232342A	1990-09-14
JP2003094170A	2003-04-02

See also references of EP 2312007A4

OCHIAI, Kenichiro (7th floor Yanagiya building. 1-10, Nihonbashi 2-chome, Chuo-k, Tokyo 27, JP)

View/Download PDF      PDF Help

Previous Patent: COPPER ALLOY MATERIAL FOR ELECTRICAL/ELECTRONIC COMPONENT

Next Patent: SELECTIVELY FUNCTIONIZED TRANSDUCER MICROARRAY