METHOD FOR PRODUCING CAST SLABS OF HIGH MANGANESE STEEL AND METHOD FOR PRODUCING HIGH MANGANESE STEEL BILLETS AND HIGH MANGANESE STEEL SHEETS

Title:

METHOD FOR PRODUCING CAST SLABS OF HIGH MANGANESE STEEL AND METHOD FOR PRODUCING HIGH MANGANESE STEEL BILLETS AND HIGH MANGANESE STEEL SHEETS

Document Type and Number:

WIPO Patent Application WO/2020/189762

Kind Code:

A1

Abstract:

Provided are: a method for producing high manganese steel billets and sheets with which it is possible to control inclusions and deposits, which determine crystal grain size, and to inhibit the generation of surface flaws; and a method for producing cast slabs of high manganese steel that are used in the production of the same.　In the method for producing cast slabs of high manganese steel, when continuously casting molten steel containing a specified component composition, the contents of Ca, O, and S for the molten steel in the tundish satisfy expression (1).　0.4≦ACR≦1.4 ・・・ (1) ACR in expression (1) is calculated using equation (2).　ACR={[%Ca]-(0. 18+130×[%Ca])×[%O]}/1. 25×[%S]) ・・・ (2) [%Ca] in equation (2) is the content (mass%) of Ca in the molten steel, [%O] is the content (mass%) of O in the molten steel, and [%S] is the content (mass%) of S in the molten steel.

Inventors:

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

Application Number:

PCT/JP2020/012345

Publication Date:

September 24, 2020

Filing Date:

March 19, 2020

Export Citation:

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Assignee:

JFE STEEL CORP (JP)

International Classes:

C22C38/00; B22D11/00; B22D11/108; C22C38/38; C22C38/58

Foreign References:

JP2016196703A	2016-11-24
JP2016084529A	2016-05-19