HIGH-MANGANESE STEEL CAST SLAB PRODUCTION METHOD AND METHOD FOR PRODUCING BILLET OR SHEET OF HIGH-MANGANESE STEEL

Title:

HIGH-MANGANESE STEEL CAST SLAB PRODUCTION METHOD AND METHOD FOR PRODUCING BILLET OR SHEET OF HIGH-MANGANESE STEEL

Document Type and Number:

WIPO Patent Application WO/2020/153407

Kind Code:

A1

Abstract:

Provided is a method for producing a high-manganese steel cast slab, with which it is possible to minimize cracks occurring during rolling when manufacturing a billet or sheet of high-manganese steel. In the high-manganese steel cast slab production method according to the present invention, when a cast slab is manufactured by continuously casting molten high-manganese steel having a specific component composition, the cast slab having a surface temperature of 600-1100°C is imparted with a processing strain that results in a processing strain amount of 3.0-10.0%, as calculated by formula (1), within a continuous casting machine or during a conveyance step taking place subsequent to the continuous casting machine but before being placed in a heating furnace for hot rolling. Formula (1): Amount of processing strain (%) = ln(pre-processing cross-sectional area of cast slab/post-processing cross-sectional area of cast slab)×100

Inventors:

ITO YOICHI (JP)
ARAMAKI NORICHIKA (JP)
NAKASHIMA KOICHI (JP)
KITSUYA SHIGEKI (JP)

Application Number:

PCT/JP2020/002150

Publication Date:

July 30, 2020

Filing Date:

January 22, 2020

Export Citation:

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Assignee:

JFE STEEL CORP (JP)

International Classes:

C21D8/00; B22D11/00; B22D11/16; B22D11/20; C21D9/00; C22C38/00; C22C38/58

Domestic Patent References:

WO2018151318A1	2018-08-23
WO2018199145A1	2018-11-01

Foreign References:

JPH0657379A	1994-03-01
JPH08507107A	1996-07-30
JPH06322440A	1994-11-22
JPS5913556A	1984-01-24
JP2011230182A	2011-11-17
JP2016196703A	2016-11-24
CN107858602A	2018-03-30
JP2018058107A	2018-04-12
KR20170085542A	2017-07-24
KR20190104077A	2019-09-05

Other References: