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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 11655518 B1

PDFFull Text
Date of Patent:
May. 23, 2023

Filed:

Nov. 16, 2021

Steel material for taylor welded blank and method for manufacturing hot-stamped part using same steel

Applicant:

Hyundai Steel Company, Incheon, KR;

Inventors:

Byung Gil Yoo, Seoul, KR;

Hyeong Hyeop Do, Chungcheongnam-do, KR;

Chee Woong Song, Seoul, KR;

Do Hak Kim, Gyeongsangbuk-do, KR;

Young Mun Shin, Chungcheongnam-do, KR;

Soon Geun Jang, Sejong, KR;

Sang Mun Hong, Gyeongsangbuk-do, KR;

Assignee:

Hyundai Steel Company, Incheon, KR;

Attorney:

Fox Rothschild LLP

Primary Examiner:

Anthony J Zimmer

Assistant Examiner:

Ricardo D Morales

Int. Cl.
CPC ...
C21D 9/50 (2006.01); B21D 22/02 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); C22C 38/04 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01);
U.S. Cl.
CPC ...
C21D 9/50 (2013.01); B21D 22/022 (2013.01); C21D 6/005 (2013.01); C21D 8/0205 (2013.01); C21D 8/0226 (2013.01); C21D 8/0236 (2013.01); C21D 8/0263 (2013.01); C22C 38/04 (2013.01); C22C 38/12 (2013.01); C22C 38/14 (2013.01); C21D 2211/005 (2013.01); C21D 2211/008 (2013.01);
Abstract

In accordance with one aspect of the present disclosure, there is provided a steel material for a tailor-welded blank, including 0.04 to 0.06 wt % of carbon (C), 1.2 to 1.5 wt % of manganese (Mn), 0.01 to 0.10 wt % of titanium (Ti), 0.01 to 0.10 wt % of niobium (Nb), and the balance of iron (Fe) and inevitable impurities; having a tensile strength (TS) of 550 MPa or greater, a yield strength (YS) of 300 MPa or greater, and an elongation (EL) of 20% or greater; and having a dual-phase structure of ferrite and martensite.

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