HIGH STRENGTH COLD ROLLED STEEL SHEET HAVING EXCELLENT SURFACE QUALITY AND LOW MECHANICAL PROPERTY DEVIATION AND MANUFACTURING METHOD OF SAME

Title:

HIGH STRENGTH COLD ROLLED STEEL SHEET HAVING EXCELLENT SURFACE QUALITY AND LOW MECHANICAL PROPERTY DEVIATION AND MANUFACTURING METHOD OF SAME

Document Type and Number:

WIPO Patent Application WO/2023/048448

Kind Code:

A1

Abstract:

The present invention relates to: a high-strength cold-rolled steel sheet having excellent surface quality and low mechanical property deviation; and a manufacturing method thereof and, more particularly, to: a high-strength cold-rolled steel sheet that can be suitably used for automotive parts by ensuring high strength and elongation with little surface defects and low mechanical property deviation; and a manufacturing method thereof.

Inventors:

RYU JOO-HYUN (KR)
KIM SUNG-IL (KR)
SEO CHANG-HYO (KR)

Application Number:

PCT/KR2022/014012

Publication Date:

March 30, 2023

Filing Date:

September 20, 2022

Export Citation:

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Assignee:

POSCO CO LTD (KR)

International Classes:

C22C38/02; B21C47/02; C21D8/02; C22C38/00; C22C38/04; C22C38/06

Domestic Patent References:

WO2020203159A1

2020-10-08

Foreign References:

KR20200101980A	2020-08-28
KR20210080044A	2021-06-30
JP2021063253A	2021-04-22
KR20140102309A	2014-08-21
KR20040066935A	2004-07-27
JP2010090432A	2010-04-22

Attorney, Agent or Firm:

C&S PATENT AND LAW OFFICE (KR)

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