Title:
PLATED STEEL PLATE AND MANUFACTURING METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2017/051998
Kind Code:
A1
Abstract:
Disclosed is a method for manufacturing a plated steel plate. The method for manufacturing a plated steel plate, according to the present invention, comprises: a step for reheating a steel slab containing 0.15 to 0.25 wt% of carbon (C), more than 0 wt% to 1.5 wt% or less of silicon (Si), 1.5 to 2.5 wt% of manganese (Mn), more than 0 wt% to 1.8 wt% or less of aluminum (Al), 0.3 to 1.0 wt% of chromium (Cr), more than 0 wt% to 0.03 wt% or less of titanium (Ti), and more than 0 wt% to 0.03 wt% or less of niobium (Nb), the remainder being iron (Fe) and unavoidable impurities; a step for manufacturing a hot-rolled steel plate by hot-rolling, cooling, and winding the steel slab; a step for cleaning the hot-rolled steel plate with an acid and then cold-rolling the same; a step for annealing the cold-rolled steel plate at a temperature of 820°C to 870°C and then cooling the same at a finish cooling temperature of 350°C to 450°C; a step for heat-treating the cooled steel plate again at a temperature of 450°C to 550°C; and a step for hot-dip-galvanizing the reheat-treated steel plate.
Inventors:
PARK JIN SUNG (KR)
KWON SUN HWAN (KR)
KWON SUN HWAN (KR)
Application Number:
PCT/KR2016/000393
Publication Date:
March 30, 2017
Filing Date:
January 14, 2016
Export Citation:
Assignee:
HYUNDAI STEEL CO (KR)
International Classes:
C21D8/02; C22C38/26; C22C38/28; C22C38/34; C22C38/38; C23C2/06; C23C2/40
Foreign References:
| KR20110067159A | 2011-06-21 | |||
| KR101235535B1 | 2013-02-28 | |||
| KR20110124078A | 2011-11-16 | |||
| JP2009185355A | 2009-08-20 | |||
| KR20140083819A | 2014-07-04 |
Other References:
See also references of EP 3378958A4
Attorney, Agent or Firm:
AJU KIM CHANG & LEE (KR)
Download PDF: