Title:
120-KG-GRADE COLD-ROLLED LOW-ALLOY ANNEALED DUAL-PHASE STEEL AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2024/041536
Kind Code:
A1
Abstract:
Disclosed in the present invention is a 120-kg-grade cold-rolled low-alloy annealed dual-phase steel, comprising Fe and inevitable impurities, and further comprising the following chemical elements in percentages by mass: 0.13% < C ≤ 0.15%, Si: 0.5-0.8%, Mn: 1.8-2.0%, Al: 0.01-0.03%, Nb: 0.015-0.025%, Ti: 0.015-0.025%, and B: 0.0020-0.0030%, wherein Mo and Cr are not included in the chemical elements. The microstructure of the 120-kg-grade cold-rolled low-alloy annealed dual-phase steel is martensite + ferrite. Accordingly, further disclosed in the present invention is a manufacturing method for the 120-kg-grade cold-rolled low-alloy annealed dual-phase steel. A 120-kg-grade cold-rolled low-alloy annealed dual-phase steel obtained by using the manufacturing method not only has good economical performance, but also has high strength, a good ratio of elongation and a good hole expansion rate.
Inventors:
LI WEI (CN)
ZHU XIAODONG (CN)
ZHU XIAODONG (CN)
Application Number:
PCT/CN2023/114269
Publication Date:
February 29, 2024
Filing Date:
August 22, 2023
Export Citation:
Assignee:
BAOSHAN IRON & STEEL (CN)
International Classes:
C22C38/02; C21D8/00; C22C38/04; C22C38/06; C22C38/12; C22C38/14
Foreign References:
| CN109280857A | 2019-01-29 | |||
| US20130133792A1 | 2013-05-30 | |||
| JP2010275627A | 2010-12-09 | |||
| CN113061812A | 2021-07-02 | |||
| CN113737086A | 2021-12-03 | |||
| CN113737087A | 2021-12-03 |
Attorney, Agent or Firm:
SHANGHAI PATENT & TRADEMARK LAW OFFICE, LLC (CN)
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