HIGH MANGANESE STEEL FOR LOW TEMPERATURE, HAVING EXCELLENT SURFACE QUALITY, AND MANUFACTURING METHOD THEREFOR

Title:

HIGH MANGANESE STEEL FOR LOW TEMPERATURE, HAVING EXCELLENT SURFACE QUALITY, AND MANUFACTURING METHOD THEREFOR

Document Type and Number:

WIPO Patent Application WO/2019/078538

Kind Code:

A1

Abstract:

The present invention provides: a high manganese steel for a low temperature; and a manufacturing method therefor, the high manganese steel comprising 0.3-0.8 wt% of C, 18-26 wt% of Mn, 0.01-1 wt% of Si, 0.01-0.5 wt% of Al, 0.1 wt% or less of Ti (excluding 0%), 1-4.5 wt% of Cr, 0.1-0.9 wt% of Cu, 0.03 wt% or less of S (excluding 0%), 0.3 wt% or less of P (excluding 0%), 0.001-0.03 wt% of N, 0.004 wt% or less of B (excluding 0%), and the balance of Fe and other inevitable impurities, wherein the microstructure is a single-phase austenitic structure, and the grain size of the austenitic structure is 50 μm or less.

Inventors:

HA YU-MI (KR)
JUNG YOUNG-DEOK (KR)
KANG SANG-DEOK (KR)
LEE UN-HAE (KR)
KIM YONG-JIN (KR)
KIM SUNG-KYU (KR)
KIM YOUNG-JU (KR)

Application Number:

PCT/KR2018/011937

Publication Date:

April 25, 2019

Filing Date:

October 11, 2018

Export Citation:

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Assignee:

POSCO (KR)

International Classes:

C22C38/38; C21D8/02; C21D9/00; C21D9/46; C22C38/20; C22C38/28

Foreign References:

JP2016196703A	2016-11-24
KR20130076570A	2013-07-08
KR20040059582A	2004-07-06
JPH064903B2	1994-01-19
KR100711371B1	2007-04-30
KR20110009792A	2011-01-31

Other References: