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A production method and technology for high carbon steel, applied in the direction of metal rolling, metal rolling, heat treatment furnace, etc., can solve the problems of difficult to achieve cold-rolled thin-sized products, large cold-rolling rolling force, etc., and achieve good cold-working performance. , the effect of hardness reduction, toughness and ductility improvement
Inactive Publication Date: 2020-05-05
HEBEI IRON AND STEEL
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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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[0025] The present invention will be described in further detail below in conjunction with specific embodiments.
[0026] (1) The chemical composition and weight percentage of the high-carbon steel described in the present invention are: C: 0.47-0.55%, Si≤0.40%, Mn: 0.80-1.0%, P≤0.025%, S≤0.015%, Cr ≤0.20%, Ni≤0.30%, Cu≤0.30%, N≤0.006%, the balance is Fe and unavoidable impurity elements.
[0027] Examples 1-10 The chemical composition and weight percentage of the hot-rolled high-carbon steel are shown in Table 1.
[0028] (2) The production method of hot-rolled high-carbon steel described in the present invention includes converter vanadium extraction, converter smelting, LF refining, slab continuous casting, slab heating, high-pressure water descaling, controlled rolling, laminar cooling, coiling process;
[0029] The slab heating process heats the slab to 1180-1210°C, and the heating time is ≤140min;
[0030] The controlled rolling process includes rough rolling and fini...
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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...
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