STEEL SUITABLE FOR LASER WELDING

Title:

STEEL SUITABLE FOR LASER WELDING

Document Type and Number:

WIPO Patent Application WO/2001/014609

Kind Code:

A1

Abstract:

A steel suitable for laser welding which has the following composition in wt %: C: 0.01 to 0.20 %, Si: 0.01 to 1.5 %, Mn: 0.2 to 2.0 %, P: 0.02 % or less, S: 0.02 % or less, Al: 0.0005 to 1.0 % and balance: Fe and inevitable impurities; and has a thickness of mill scale of 50 $g(m)m or less; and satisfies the following formula: 0.4 < (0.88 [%Al] + 1.14 [%Si]) < 1.5. It is preferred that the steel further comprises one or more elements selected from among Nb, V, Mo, Cu, Ni, Cr and B. The steel exhibits excellent laser welding characteristics even when the mill scale is not removed.

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Inventors:

KOJIMA KAZUHIRO (JP)
OHKITA SHIGERU (JP)
FUJI MASAO (JP)
AIHARA SYUJI (JP)
HOSHINO MANABU (JP)
SAITOH NAOKI (JP)
TSUZUKI TAKESHI (JP)

Application Number:

PCT/JP2000/001679

Publication Date:

March 01, 2001

Filing Date:

March 17, 2000

Export Citation:

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Assignee:

NIPPON STEEL CORP (JP)
KOJIMA KAZUHIRO (JP)
OHKITA SHIGERU (JP)
FUJI MASAO (JP)
AIHARA SYUJI (JP)
HOSHINO MANABU (JP)
SAITOH NAOKI (JP)
TSUZUKI TAKESHI (JP)

International Classes:

C22C38/02; C22C38/04; C22C38/06; C21D8/02; (IPC1-7): C22C38/06

Foreign References:

JPH09194998A	1997-07-29
JP2000109946A	2000-04-18
JPH03180444A	1991-08-06

Other References: