HOT-ROLLED STEEL SHEET AND METHOD FOR MANUFACTURING SAME

Title:

HOT-ROLLED STEEL SHEET AND METHOD FOR MANUFACTURING SAME

Document Type and Number:

WIPO Patent Application WO/2016/167313

Kind Code:

A1

Abstract:

Provided is a hot-rolled steel sheet in which the formation of an internal oxide layer is restricted and which has superior workability. This hot-rolled steel sheet according to an embodiment of the present invention has a chemical composition that satisfies formula (1) and contains, by mass%, 0.07-0.30% of C, over 1.0-2.8% of Si, 2.0-3.5% of Mn, no more than 0.030% of P, no more than 0.010% of S, 0.01 to less than 1.0% of Al, no more than 0.01% of N, no more than 0.01% of O, and 0.03-0.30% of Sb, the remainder comprising Fe and unavoidable impurities. (1) Si + Mn ≥ 3.20 where, the chemical symbols in formula (1) are assigned the content (% by mass) of the corresponding element.

Inventors:

TANAKA YASUAKI (JP)
SAKAKIBARA MUTSUMI (JP)
YOKOYAMA TAKAFUMI (JP)
KAWATA HIROYUKI (JP)
SUGIURA NATSUKO (JP)
KONDO YASUMITSU (JP)

Application Number:

PCT/JP2016/061991

Publication Date:

October 20, 2016

Filing Date:

April 14, 2016

Export Citation:

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Assignee:

NIPPON STEEL & SUMITOMO METAL CORP (JP)

International Classes:

C22C38/00; C22C38/60; B21B1/26; C21D9/46

Domestic Patent References:

WO2015015739A1	2015-02-05
WO2013099235A1	2013-07-04

Foreign References:

JP2014508854A	2014-04-10
JP2008297609A	2008-12-11
JP2014214374A	2014-11-17
JP2013216961A	2013-10-24
JP2010502845A	2010-01-28
JP2011063877A	2011-03-31
JP2013060657A	2013-04-04

Other References: