HOT-ROLLED STEEL FOR ENAMELING HAVING ENAMELING AND FIRING STRENGTHENING PROPERTY, AND MANUFACTURING METHOD THEREFOR

Title:

HOT-ROLLED STEEL FOR ENAMELING HAVING ENAMELING AND FIRING STRENGTHENING PROPERTY, AND MANUFACTURING METHOD THEREFOR

Document Type and Number:

WIPO Patent Application WO/2023/088294

Kind Code:

A1

Abstract:

Disclosed is a hot-rolled steel for enameling having an enameling and firing strengthening property, comprising, in addition to Fe and inevitable impurities, the following chemical elements in mass percent: C: 0.03-0.07%, Si≤0.05%, Mn: 1.5-2.5%, Al: 0.01-0.05%, Cr: 0.25-0.65%, Cu: 0.02-0.20%, Ti: 0.01-0.08%, V: 0.01-0.10%, and Mo: 0.01-0.10%. Accordingly, further disclosed is a manufacturing method for the hot-rolled steel for enameling, comprising the steps of: (1) smelting and casting; (2) heating; (3) hot rolling, the temperature of rough rolling being controlled to be greater than 850°C, the start temperature of finish rolling being controlled to be 900-1050°C, and the final temperature of finish rolling being controlled to be 840-900°C; (4) laminar cooling, the cooling speed being controlled to be 10-35°C/s; and (5) coiling. The hot-rolled steel for enameling provided by the present invention has low strength and good formability in a hot-rolled state, and after high-temperature enameling and firing, the yield strength of the hot-rolled steel for enameling is not decreased but increased, such that the strength of a final enamel product can be effectively improved.

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Inventors:

WANG SHUANGCHENG (CN)
SUN QUANSHE (CN)
TAO XIAOYONG (CN)

Application Number:

PCT/CN2022/132223

Publication Date:

May 25, 2023

Filing Date:

November 16, 2022

Export Citation:

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Assignee:

BAOSHAN IRON & STEEL (CN)

International Classes:

C22C38/38; C21D8/00; C23D5/00

Foreign References:

CN105316579A	2016-02-10
CN112119174A	2020-12-22
JP2008255445A	2008-10-23
CN101517115A	2009-08-26
CN108396235A	2018-08-14
CN1966753A	2007-05-23
US20150267284A1	2015-09-24
CN101139684A	2008-03-12

Attorney, Agent or Firm:

SHANGHAI PATENT & TRADEMARK LAW OFFICE, LLC (CN)

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