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Continuous casting steel plate for porcelain enameling excellent in formability, resistance to occurrence of bubble or black point, and adhesion with porcelain enamel

A formability, anti-foaming technology, applied in the direction of manufacturing tools, furnace types, metal rolling, etc., can solve the problems of black spot resistance and low foaming

Inactive Publication Date: 2001-10-31
NIPPON STEEL CORP
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Problems solved by technology

The proposed technology can provide a steel sheet with good deep drawability, however, its resistance to black spots and blisters is lower than that of a completely Al-free high oxygen steel

Method used

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  • Continuous casting steel plate for porcelain enameling excellent in formability, resistance to occurrence of bubble or black point, and adhesion with porcelain enamel
  • Continuous casting steel plate for porcelain enameling excellent in formability, resistance to occurrence of bubble or black point, and adhesion with porcelain enamel
  • Continuous casting steel plate for porcelain enameling excellent in formability, resistance to occurrence of bubble or black point, and adhesion with porcelain enamel

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Embodiment Construction

[0032] The best solution for implementing the present invention

[0033] A detailed description of the present invention is given here.

[0034] First, the chemical composition of the steel was analyzed in detail.

[0035] It has been known for a long time that the lower the C content in steel sheets, the better the formability. In order to obtain an aging index below 5 MPa and an r-value > 2.0 in the present invention, a C content of ≤ 0.002% is necessary. Preferably C≤0.0015%. Although it is not necessary to indicate the lower limit of C, the actual lower limit is 0.0005%, because further reducing the C content will increase the manufacturing cost.

[0036] Si content must be controlled at not more than 0.01%, because Si is detrimental to the performance of enamel. In order to obtain good enamel properties, the preferred Si content range is ≤0.005%.

[0037] Mn is an important element affecting the performance of enamel when it is added together with O, V, and Nb. Mn c...

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Abstract

A vitreous enamel steel sheet produced by a continuous casting, excellent in formability, bubbling and black spot resistance and adhesiveness, which comprises, in terms of mass %, 0.002% or less of C, 0.05 to 0.2% of Mn, 0.01% or less of Si, 0.004% or less of N, 0.015 to 0.05% of 0, less than 0.01% of P, 0.025% or less of S, 0.02 to 0.04% of Cu, 0.03 to 0.05% of Nb, and 0.03 to 0.07% of V, satisfying the inequality: 0.2>Mn (%)-2.0.O (%)+0.8.V (%)+0.5.Nb (%), and the balance consisting of Fe and unavoidable impurities, and a method for producing the same.

Description

field of invention [0001] The present invention relates to a steel plate for enamelling, which has excellent enamelling properties (adhesion and anti-foaming, anti-black spots) and formability, and is characterized in that it is manufactured by continuous casting steel plate. Background of the invention [0002] Steel plates for enamelling are usually manufactured by casting capping steel or boiling steel ingots, preliminary rolling, hot rolling, cold rolling, followed by decarburization and additional denitrogenation annealing by loose coil annealing to reduce carbon and nitrogen concentration to tens of ppm or lower. Since ingot casting and preliminary rolling are required and decarburization / denitrification are required in the manufacturing process, the steel sheet for enameling manufactured through these steps is relatively expensive to manufacture. Another problem is that it cannot be used to make final products that require high deep drawing processing. [0003] In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/46C21D8/04C22C38/00C22C38/04C22C38/12C22C38/16
CPCC22C38/004C22C38/12C22C38/04C21D8/0473C22C38/16C21D8/0436C21D8/0426
Inventor 西村哲末广正芳佐柳志郎
Owner NIPPON STEEL CORP
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