Title:
60-KILOGRAM-GRADE COLD-ROLLED LOW-ALLOY ANNEALED DUAL-PHASE STEEL AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2024/041540
Kind Code:
A1
Abstract:
Disclosed in the present invention is 60-kilogram-grade cold-rolled low-alloy annealed dual-phase steel, comprising Fe and inevitable impurity elements, and further comprising the following chemical elements in percentage by mass: 0.08%-0.1% of C, 0.1%-0.2% of Si, 1.2%-1.4% of Mn, 0.01%-0.02% of Al, and 0.0020%-0.0030% of B. The chemical elements of the steel do not comprise Mo and Cr. The microstructure of the 60-kilogram-grade cold-rolled low-alloy annealed dual-phase steel comprises martensite + ferrite. Correspondingly, further disclosed in the present invention is a manufacturing method for the 60-kilogram-grade cold-rolled low-alloy annealed dual-phase steel. According to the present invention, the 60-kilogram-grade cold-rolled low-alloy annealed dual-phase steel obtained by means of reasonable chemical component design in combination with optimization processes has the characteristics of low costs and excellent mechanical properties, and has good popularization prospects and application value.
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Inventors:
LI WEI (CN)
Application Number:
PCT/CN2023/114300
Publication Date:
February 29, 2024
Filing Date:
August 22, 2023
Export Citation:
Assignee:
BAOSHAN IRON & STEEL (CN)
International Classes:
C22C38/02; C21D1/26; C21D6/00; C21D8/02; C21D11/00; C22C38/04; C22C38/06
Foreign References:
| CN114150216A | 2022-03-08 | |||
| CN102953001A | 2013-03-06 | |||
| CN115181883A | 2022-10-14 | |||
| CN103509997A | 2014-01-15 | |||
| CN103938070A | 2014-07-23 | |||
| KR20130055240A | 2013-05-28 |
Attorney, Agent or Firm:
SHANGHAI PATENT & TRADEMARK LAW OFFICE, LLC (CN)
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