COLD-ROLLED STEEL FOR DEEP DRAWING Russian patent published in 2004 - IPC

FIELD: ferrous metallurgy.

SUBSTANCE: invention relates to the composition of low-carbon cold-rolled steels designated for making articles with the complex configuration being mainly for car articles, among them with protective covers. The claimed cold-rolled steel for deep drawing comprises components taken in the following ratio, wt.-%: carbon, 0.001-0.006; silicon, 0.002-0.020; manganese, 0.07-0.30; phosphorus, 0.005-0.020; sulfur, 0.005-0.010; aluminum. 0.015-0.050; nitrogen, 0.002-0.006; titanium, 0.02-0.08; oxygen, 0.001-0.005; iron and inevitable impurities, the balance. The total content of aluminum and titanium is 0.07-0.12 wt.-%, and the ratio of aluminum content to the oxygen content is less 5.0. Invention provides the enhancement of stamping capacity of steel being independently of the thermal treatment regimen and applying the protective cover and enhancing the corrosion stability.

EFFECT: valuable properties of steel.

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