HIGH-STRENGTH REINFORCING STEEL AND METHOD FOR MANUFACTURING SAME

WIPO Patent Application WO/2018/074887

A1

A method for manufacturing a high-strength reinforcing steel according to an embodiment comprises: a step for re-heating a slab at a temperature range of 1000-1100°C, the slab comprising, by means of wt%, 0.18-0.45% of carbon (C), 0.05-0.30% of silicon (Si), 0.40-3.00% of manganese (Mn), more than 0 and equal to or less than 0.04% of phosphorus (P), more than 0 and equal to or less than 0.04% of sulfur (S), more than 0 and equal to or less than 1.0% of chromium (Cr), more than 0 and equal to or less than 0.50% of copper (Cu), more than 0 and equal to or less than 0.25% of nickel (Ni), more than 0 and equal to or less than 0.50% of molybdenum (Mo), more than 0 and equal to or less than 0.040% of aluminum (Al), more than 0 and equal to or less than 0.20% of vanadium (V), more than 0 and equal to or less than 0.040% of nitrogen (N), more than 0 and equal to or less than 0.1% of antimony (Sb), more than 0 and equal to or less than 0.1% of tin (Sn), and the balance iron (Fe) and other inevitably contained impurities; a step for finish hot-rolling the re-heated slab at a temperature of 850-1000°C; and a step for cooling the hot-rolled steel material at a temperature of Ms (°C) passing through a temp-core process.

CHUNG JUN HO (KR)
KIM WON HOE (KR)
PARK JUNG WOOK (KR)
KIM HYUN SUB (KR)

PCT/KR2017/011664

April 26, 2018

October 20, 2017

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HYUNDAI STEEL CO (KR)

B21B1/16; B21B1/46; B21B3/02; B21B37/74; C22C38/00; C22C38/02; C22C38/42; C22C38/44; C22C38/46; C22C38/60

KR20160120235A	2016-10-17
KR20120132829A	2012-12-10
KR20120000766A	2012-01-04
KR20090132796A	2009-12-31
KR20110066281A	2011-06-17

AJU INTERNATIONAL LAW & PATENT GROUP (KR)

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