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)
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:
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)
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:
See also references of EP 1136580A4
Attorney, Agent or Firm:
Ishida, Takashi (Ishida & Associates Toranomon 37 Mori
Building 5-1, Toranomon 3-chome Minato-ku Tokyo, JP)
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