Hot-rolled high-carbon steel production method

Abstract

The invention belongs to the field of a metallurgy technology, and particularly relates to a hot-rolled high-carbon steel production method. The hot-rolled high-carbon steel production method comprises the processes of extracting vanadium by a converter, smelting through the converter, refining through an LF (ladle furnace), carrying out slab continuous casting, heating a slab, descaling through high pressure water, controlled rolling, laminarly cooling, and coiling. The high-carbon steel is prepared from the chemical components in percentage by weight: 0.47 to 0.55 percent of C, less than orequal to 0.40 percent of Si, 0.80 to 1.0 percent of Mn, less than or equal to 0.025 percent of P, less than or equal to 0.015 percent of S, less than or equal to 0.006 percent of N, and the balance Feand inevitable impurity elements. According to the hot-rolled high-carbon steel production method provided by the invention, through the reasonable heating, rolling and coiling processes, in the obtained high-carbon steel, a pearlite structure is fine, the thickness of a decarburized layer is low, a favorable cold processing performance is realized, the annealing-free treatment can be realized, the processing cost is reduced, and a better economic benefit is achieved.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a production method of hot-rolled high-carbon steel. Background technique [0002] High-carbon steel has good strength, toughness, hardness, wear resistance and other properties. It is mainly used to manufacture various tools, measuring tools and high-strength construction steel. When used to manufacture measuring tools, the product has strict requirements on thickness accuracy. And the thickness is required to be relatively thin, the thinnest reaches about 0.01mm, so it needs to be realized by cold rolling. [0003] Cold rolling is the secondary reprocessing of hot-rolled substrates to achieve better thickness and flatness. When cold-rolling high-carbon steel, due to the high strength and hardness of the hot-rolled substrate and the large cold-rolling force, it is difficult to achieve cold-rolled thin-gauge products. Therefore, in order to obtain thin-gauge prod...

AI Technical Summary

Problems solved by technology

When cold-rolling high-carbon steel, due to the high strength and hardness of the hot-rolled substrate and the large cold-rolling force, it is difficult to achieve cold-rolled thin-gauge products

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