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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 8999085 B1

PDFFull Text
Date of Patent:
Apr. 07, 2015

Filed:

Dec. 22, 2006

High manganese steel strips with excellent coatability and superior surface property, coated steel strips using steel strips and method for manufacturing the steel strips

Applicants:

Seong-ju Kim, Kyungsangbook-do, KR;

Kwang-geun Chin, Kyungsangbook-do, KR;

Hyun-gyu Hwang, Kyungsangbook-do, KR;

Sung-kyu Kim, Kyungsangbook-do, KR;

Il-ryoung Sohn, Kyungsangbook-do, KR;

Young-kook Lee, Seoul, KR;

Oh-yeon Lee, Cheonlabook-do, KR;

Inventors:

Seong-Ju Kim, Kyungsangbook-do, KR;

Kwang-Geun Chin, Kyungsangbook-do, KR;

Hyun-Gyu Hwang, Kyungsangbook-do, KR;

Sung-Kyu Kim, Kyungsangbook-do, KR;

Il-Ryoung Sohn, Kyungsangbook-do, KR;

Young-Kook Lee, Seoul, KR;

Oh-Yeon Lee, Cheonlabook-do, KR;

Assignee:

Posco, Pohang-si, KR;

Attorney:

The Webb Law Firm

Primary Examiner:

Yoshitoshi Takeuchi

Int. Cl.
CPC ...
C23C 14/34 (2006.01); C25D 7/00 (2006.01); C25D 9/00 (2006.01); C25D 11/00 (2006.01); B22D 17/00 (2006.01); C21D 1/84 (2006.01); C21D 5/00 (2006.01); C21D 8/04 (2006.01); C21D 9/00 (2006.01); C21D 8/02 (2006.01); C21D 6/00 (2006.01); C21D 8/00 (2006.01); C21D 6/02 (2006.01); C22C 38/02 (2006.01); C21D 9/48 (2006.01); C22C 38/00 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/28 (2006.01); C22C 38/32 (2006.01);
U.S. Cl.
CPC ...
C22C 38/02 (2013.01); C21D 6/004 (2013.01); C21D 8/04 (2013.01); C21D 8/0405 (2013.01); C21D 9/48 (2013.01); C22C 38/002 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/28 (2013.01); C22C 38/32 (2013.01);
Abstract

A high-ductility, high-strength and high Mn steel strip used for steel strips of automobiles requiring superior formability and high strength, a plated steel strip produced by using the same, and a manufacturing method thereof are disclosed. The high Mn steel strip comprises, by weight %, 0.2˜1.5% of C, 10˜25% of Mn, 0.01˜3.0% of Al, 0.005˜2.0% of Si, 0.03% or less of P, 0.03% or less of S, 0.040% or less of N, and the balance of Fe and other unavoidable impurities. The high-ductility, high-strength and high Mn steel strip, and the plated steel strip produced by using the same have superior surface properties and plating characteristics.

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