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

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 ...

AI Technical Summary

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

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