Title:
LOW-ALLOY HIGH-STRENGTH Q420C STEEL PLATE AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/127192
Kind Code:
A1
Abstract:
Disclosed in the present invention is a low-alloy high-strength Q420C steel plate. The steel plate comprises the following chemical components in percentage by mass (wt%): C: 0.16-0.20, Si: 0.15-0.30, Mn: 0.70-0.90, P<0.020, S<0.012, Ti: 0.055-0.065, Als: 0.010-0.03, with the balance being Fe and residual elements. Also disclosed in the present invention is a production method for lowering costs of the low-alloy high-strength Q420C steel plate. According to the production method for the low-alloy high-strength Q420C steel plate, components are reasonably designed, a low-Mn high-Ti low-alloy component system is employed, and ductility is not reduced while ensuring strength; an ideal F+P structure is obtained by using clean molten steel, optimized temperature-controlled rolling and accelerated cooling control (ACC) process; crystal grains are uniform and small; mechanical properties can meet the requirements of GB/T 1591-2018; and in addition, the production cost is lower than that of other steel companies capable of producing Q420C, thus creating a strong competitive advantage.
Inventors:
LIU WEI (CN)
YU FEI (CN)
WANG XIAOJING (CN)
YAN WENKAI (CN)
WANG PEIXIN (CN)
SUN FULAI (CN)
ZHANG GONG (CN)
YU FEI (CN)
WANG XIAOJING (CN)
YAN WENKAI (CN)
WANG PEIXIN (CN)
SUN FULAI (CN)
ZHANG GONG (CN)
Application Number:
PCT/CN2021/115468
Publication Date:
June 23, 2022
Filing Date:
August 30, 2021
Export Citation:
Assignee:
TIANJIN IRON AND STEEL GROUP CO LTD (CN)
International Classes:
C22C38/02; B21B1/46; B21B37/74; C21D8/02; C22C33/06; C22C38/04; C22C38/06; C22C38/14
Foreign References:
| CN112725691A | 2021-04-30 | |||
| CN111455267A | 2020-07-28 | |||
| CN111560561A | 2020-08-21 | |||
| CN104018063A | 2014-09-03 | |||
| JP2008156680A | 2008-07-10 |
Attorney, Agent or Firm:
TIANJIN DINGHE PATENT & TRADEMARK AGENCY CO., INC (CN)
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