Phosphorus-containing interstitial-free cold-rolled galvanized steel sheet, and manufacturing method thereof

Abstract

The invention relates to a phosphorus-containing interstitial-free (IF) cold-rolled galvanized steel sheet, and a manufacturing method thereof. The manufacturing method is mainly used for solving technical problems in the prior art that the manufacturability of phosphorus-containing IF steel is poor, and manufacturing cost is high. The phosphorus-containing interstitial-free (IF) cold-rolled galvanized steel sheet comprises, by weight, C<=0.003%, Si<=0.03%, 0.2 to 0.6% of Mn, 0.04 to 0.08% of P, S<=0.02%, N<=0.005%, 0.02 to 0.06% of Alt, 0.004 to 0.089% of Ti, and the balance Fe and inevitable impurities, wherein 0.004%<=Ti-(3.4N+1.5S+4C)<=0.03%. The yield strength of the phosphorus-containing interstitial-free (IF) cold-rolled galvanized steel sheet R<P0.2> is equal to or larger than 260MPa, and the phosphorus-containing interstitial-free (IF) cold-rolled galvanized steel sheet is mainly used for preparing color-coated sheet base plates and household electrical appliance panels.

Description

technical field [0001] The invention relates to a cold-rolled galvanized steel sheet, in particular to a phosphorus-containing interstitial-free cold-rolled galvanized steel sheet and a manufacturing method thereof, belonging to the technical field of iron-based alloys. Background technique [0002] In recent years, the domestic home appliance industry has begun to use color-coated panels in panel manufacturing. Because they come with various colors or patterns, they do not require panel coloring processes such as electrostatic spraying after molding, so they have the advantages of easy production and no pollution. In addition, color-coated panels generally use galvanized panels as the substrate, and the zinc layer can reduce the corrosion of the environment on the steel panels and play a good role in protection. To make color-coated panels for home appliance panels, first of all, in the production and processing, especially in the bending and forming of curved surfaces, the...

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Problems solved by technology

[0008] The purpose of the present invention is to provide a phosphorus-containing interstitial-free cold-rolled galvanized steel sheet and its manufacturing method, which mainly solves the technical problems of poor manufacturability and high manufacturing cost of phosphorus-containing IF steel in the prior art

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