COLD-ROLLED ANNEALED DUAL-PHASE STEEL, STEEL PLATE, AND MANUFACTURING METHOD THEREFOR

Title:

COLD-ROLLED ANNEALED DUAL-PHASE STEEL, STEEL PLATE, AND MANUFACTURING METHOD THEREFOR

Document Type and Number:

WIPO Patent Application WO/2019/001424

Kind Code:

A1

Abstract:

A cold-rolled annealed dual-phase steel has a microstructure of ferrite and martensite, and comprises the chemical elements in mass percentage: 0.08% to 0.1% of C, 1.95% to 2.2% of Mn, 0.1% to 0.6% of Si, 0.020% to 0.050% of Nb, 0.020% to 0.050% of Ti, 0.015% to 0.045% of Als, 0.40% to 0.60% of Cr, 0.2% to 0.4% of Mo, 0.001% to 0.005% Ca, and the balance: Fe and other inevitable impurities. A method for manufacturing the cold-rolled annealed dual-phase steel comprises the steps of: (1) smelting and casting; (2) hot rolling; (3) cold rolling; (4) annealing; and (5) leveling.

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Inventors:

LI WEI (CN)
ZHU XIAODONG (CN)
XUE PENG (CN)

Application Number:

PCT/CN2018/092879

Publication Date:

January 03, 2019

Filing Date:

June 26, 2018

Export Citation:

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Assignee:

BAOSHAN IRON & STEEL (CN)

International Classes:

C22C38/38; C21D1/26

Foreign References:

CN101802233A	2010-08-11
CN103987868A	2014-08-13
CN103952523A	2014-07-30
EP2031081A1	2009-03-04

Other References: