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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 11643697 B1

PDFFull Text
Date of Patent:
May. 09, 2023

Filed:

Mar. 02, 2021

High-strength reinforcing steel and method for manufacturing same

Applicant:

Hyundai Steel Company, Incheon, KR;

Inventors:

Jun Ho Chung, Seoul, KR;

Won Hoe Kim, Seoul, KR;

Jung Wook Park, Incheon, KR;

Hyun Sub Kim, Pohang-si, KR;

Assignee:

Hyundai Steel Company, Incheon, KR;

Attorney:

Locke Lord LLP

Primary Examiner:

Anthony J Zimmer

Assistant Examiner:

Dean Mazzola

Int. Cl.
CPC ...
C21D 8/06 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/60 (2006.01); C22C 38/46 (2006.01); C21D 8/02 (2006.01); C22C 38/04 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/18 (2006.01); C22C 38/40 (2006.01);
U.S. Cl.
CPC ...
C21D 8/065 (2013.01); C21D 8/0226 (2013.01); C22C 38/008 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/18 (2013.01); C22C 38/40 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); C22C 38/60 (2013.01); C21D 2211/005 (2013.01); C21D 2211/008 (2013.01); C21D 2211/009 (2013.01); C21D 2221/10 (2013.01);
Abstract

A method for manufacturing a high-strength steel bar can include the steps of: reheating a steel slab at a temperature ranging from 1000° C. to 1100° C., the steel slab including a certain amount of carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), chromium (Cr), copper (Cu), nickel (Ni), molybdenum (Mo), aluminum (Al), vanadium (V), nitrogen (N), antimony (Sb), tin (Sn), and iron (Fe) and other inevitable impurities, The method can further include finish hot-rolling the reheated steel slab at a temperature of 850° C. to 1000° C., and cooling the hot-rolled steel to a martensite transformation start temperature (Ms (° C.)) through a tempcore process.

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