Preparation technology of low-carbon deep drawing steel

Abstract

The invention provides a preparation technology of low-carbon deep drawing steel, comprising: converter smelting process, argon station process, RH refining process, slab continuous casting process and billet rolling process which are successively carried out. According to the converter smelting process, end point carbon content is controlled to 0.06-0.08%, end point oxygen content is controlled to 200-400 ppm, and tapping temperature is controlled to 1660-1680 DEG C. in comparison with the prior art, the preparation technological process of low-carbon deep drawing steel is optimized, and further decarburization is carried out through the RH refining process to achieve high-carbon tapping by the converter process and avoid generation of lots of field trash. Converter tapping carbon contentis relatively high, molten steel peroxidation degree is low, deoxidation alloying consumption is minimized, yield of molten steel is high, and erosion of converter lining is reduced. By the preparation technology, low-carbon deep drawing steel with good quality can be obtained.

Description

technical field [0001] The invention relates to the technical field of steel smelting, in particular to a preparation process of low-carbon deep-drawing steel. Background technique [0002] After cold-rolled and annealed hot-rolled coils for low-carbon deep drawing, the products have high strength, good toughness, easy processing and good weldability, etc., so they are widely used in household appliances, ships, automobiles, bridges, Manufacturing industries such as construction, machinery, and pressure vessels. [0003] At present, the manufacturing processes of low-carbon deep-drawing steel produced by various domestic steel mills mainly include the following types: Process 1: Converter smelting—LF furnace—RH refining—continuous casting pouring—billet cleaning—furnace rolling (such as Meishan Iron and Steel Co., Ltd. Maanshan Iron and Steel, etc.); process flow 2: converter smelting—RH refining—LF furnace—continuous casting pouring—billet cleaning—furnace rolling (this ki...

AI Technical Summary

Problems solved by technology

[0004] The main disadvantage of the above-mentioned technology is that the process flow is long, and the fluctuation of the production process causes the quality of the molten steel to be unstable, so that the quality of steel coil peeling and heavy skin is about 0.5%. High energy consumption, high iron consumption, high cost, great corrosion to the converter lining, and high carbon dioxide emissions

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