STEEL SECTION AND STEEL SECTION MANUFACTURING METHOD

Title:

STEEL SECTION AND STEEL SECTION MANUFACTURING METHOD

Document Type and Number:

WIPO Patent Application WO/2024/091057

Kind Code:

A1

Abstract:

A steel section manufacturing method, according to one embodiment of the present invention, comprises the steps of: (a) reheating steel at a temperature of 1200°C or higher, the steel comprising 0.17% by weight or less of carbon (C), 1.6% by weight or less of manganese (Mn), 0.10-0.35% by weight of chromium (Cr), 0.15% by weight or less of molybdenum (Mo), 0.05% by weight or less of niobium (Nb), 0.003% by weight or less of boron (B), 0.04% by weight or less of titanium (Ti), and the remainder being iron (Fe) and other inevitable impurities; (b) hot rolling the steel and controlling the rolling start temperature to 1050-1100°C and the rolling end temperature to 860-930°C; and (c) water cooling the steel. Thereby, it is possible to implement a high-performance steel section and a steel section manufacturing method which simultaneously have earthquake-resistant performance and fire-resistant performance.

Inventors:

HONG DO HYUNG (KR)
KANG MUN SEOK (KR)
JANG HONG KI (KR)
CHUNG JUN HO (KR)
PARK CHANG JUN (KR)
OH MUN SEONG (KR)
KIM TAE HYUNG (KR)
HWANG SEON HYUK (KR)

Application Number:

PCT/KR2023/016838

Publication Date:

May 02, 2024

Filing Date:

October 27, 2023

Export Citation:

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Assignee:

HYUNDAI STEEL CO (KR)

International Classes:

C22C38/38; C21D1/60; C21D8/02; C22C38/00; C22C38/22; C22C38/26; C22C38/28; C22C38/32

Foreign References:

JP2005272949A	2005-10-06
JP2001286901A	2001-10-16
JP2012041603A	2012-03-01
JP2005264208A	2005-09-29
JP2000096136A	2000-04-04