HIGH-STRENGTH METAL SHEET FOR USE IN CANS, AND MANUFACTURING METHOD THEREFOR

Title:

HIGH-STRENGTH METAL SHEET FOR USE IN CANS, AND MANUFACTURING METHOD THEREFOR

Document Type and Number:

WIPO Patent Application WO/2009/116680

Kind Code:

A1

Abstract:

Disclosed are a metal sheet for cans that has a yield strength of no less than 450MPa and which does not cause slab corner cracks in a continuous casting process, and a manufacturing method of the same. The metal sheet contains 0.03-0.10% C, 0.01−0.5% Si, 0.001−0.100% P, 0.001−0.0.020% S, 0.01−0.10% Al, 0.005−0.012% N, and the remainder consists of Fe and unavoidable impurities. When Mnf=Mn[mass%]−1.71×S[mass%], Mnf is 0.3−0.6. The composition contains no pearlite compositions. Preferably, S is 0.001−0.005% and/or Al is 0.01−0.04%. The metal sheet obtains a yield strength of 450−470MPa through increased solubility by means of solubility-increasing elements such as C and N, and crystalline grain refinement and solubility increase by means of P and Mn. Also, by containing lower amounts of S and/or A1, cracks in the slab corners are prevented.

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Inventors:

TANAKA TAKUMI (JP)
KOJIMA KATSUMI (JP)
ARATANI MAKOTO (JP)
IWASA HIROKI (JP)

Application Number:

PCT/JP2009/056015

Publication Date:

September 24, 2009

Filing Date:

March 18, 2009

Export Citation:

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Assignee:

JFE STEEL CORP (JP)
TANAKA TAKUMI (JP)
KOJIMA KATSUMI (JP)
ARATANI MAKOTO (JP)
IWASA HIROKI (JP)

International Classes:

C22C38/00; B22D11/00; B22D11/124; C21D9/46; C22C38/06

Foreign References:

JP2000160289A	2000-06-13
JPH08325670A	1996-12-10
JPH1060592A	1998-03-03
JP2005336610A	2005-12-08
JP2007160341A	2007-06-28
JPH05195073A	1993-08-03
JPS5950125A	1984-03-23
JPS6230848A	1987-02-09
JP2000026921A	2000-01-25

Other References: