Method for producing cord steel

Abstract

The invention discloses a method for producing cord steel, which comprises smelting, refining, continuous casting and rolling and specifically comprises the following steps of: 1, adding waste steel and molten iron raw materials into a converter, and raising quality requirements for the molten iron and the waste steel; 2, smelting the raw materials in the converter, and controlling the aim carbon content to be 0.30 to 0.70 percent; 3, controlling steel tapping; 4, refining the steel; 5, continuously casting billets, electromagnetically stirring the billets by using a crystallizer, and controlling the continuous casting pulling speed to be 2.0 to 2.6m / min; and 6, rolling wires at high speed, and rolling the billets to form cord steel coil rods by using a high-speed wire mill. The method saves the processes of molten iron desulfuration or molten iron three-removal pretreatment and RH or VD vacuum treatment of molten steel, saves electromagnetic stirring of two cooling zones and electromagnetic stirring of a tail end in continuous casting production, saves primary rolling cogging and steel ingot polishing, improves the yield, realizes reduction of cost, and saves energy.

Description

technical field [0001] The invention relates to the field of iron and steel metallurgical production, in particular to a production method of cord steel and products thereof. Background technique [0002] Cord steel has extremely high requirements in terms of steel strength, pulling performance, steel purity, and inclusion size and shape. It is a representative product of ultra-clean steel and a symbolic product of wire quality. It is known as Known as "the best wire rod", it is one of the steel types with the highest quality requirements and the most difficult production in wire products. It has high technical requirements for smelting, rolling, processing and other links. It is mainly used in automobiles and aircraft tires. . [0003] At present, there are mainly the following methods for the production of cord steel at home and abroad: method 1, three stripping of molten iron → converter → LF → RH (VD) vacuum → bloom continuous casting → electromagnetic stirring in the m...

AI Technical Summary

Problems solved by technology

[0005] The common disadvantages of the above-mentioned cord steel production methods are: first, they all adopt molten iron pretreatment and vacuum treatment process, which increases the production cost; Contains impurities, and a large amount of recarburizer will inevitably pollute the molten steel; third, the production process is technically complicated and the cost is high

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