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.:
Date of Patent:
Apr. 26, 2016
Filed:
May. 06, 2011
Applicants:
Dong-hyun Kim, Pohang, KR;
Woo-gi Shin, Pohang, KR;
You-hwan Lee, Pohang, KR;
Inventors:
Assignee:
POSCO, Pohang-si, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C 38/02 (2006.01); C22C 38/04 (2006.01); C21D 9/52 (2006.01); C21D 8/06 (2006.01);
U.S. Cl.
CPC ...
C21D 9/52 (2013.01); C21D 8/065 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C21D 2211/003 (2013.01); C21D 2211/005 (2013.01);
Abstract
Provided is an ultra-fine grained, high-strength, high-toughness carbon steel wire rod manufactured through control of a microstructure by process control without addition of relatively expensive alloying elements. More particularly, the material provided is an ultra-fine grained, high-strength, high-toughness carbon steel wire rod having a microstructure including a ferrite structure having an area fraction of 60% or more and a cementite structure as a remainder, wherein an average grain diameter of ferrite grains is 15 μm or less. Also provided is a method of manufacturing the wire rod.