Rough rolling method capable of improving core tissue of high-carbon steel wire

Abstract

The invention provides a rough rolling method capable of improving a core tissue of a high-carbon steel wire and belongs to the technical field of high-wire rolled steel. The technical parameters controlled in the process are as follows: high-wire rolling is carried out on a 150mm*150mm or 160mm*160mm continuously-cast small square blank, and the temperature difference between the core and surface of a continuously-cast blank discharged from a heating furnace is controlled at 20-40 DEG C; the rolling speed of a first rack for rough rolling is controlled at 0.15-0.17m / min; the working diameter of a roll is controlled at 550-580mm, and the equivalent strain is controlled at 0.33-0.35; the rolling speed of a second rack for rough rolling is controlled at 0.2-0.22m / s, the working diameter of a roll is controlled at 530-550mm, and the equivalent strain is controlled at 0.28-0.39; the rolling speed of a third rack for rough rolling is controlled at 0.28-0.3m / s, the diameter of a roll is controlled at 600-620mm, the equivalent strain is controlled at 0.55-0.75, and the extension coefficient is controlled at 1.5-1.6. The rough rolling method is suitable for developing high-carbon steel wire varieties by use of rolling in one heat and continuously-cast small square blanks in a steel mill. The rough rolling method has the advantage of improving the comprehensive mechanical property and quality of the high-carbon steel wire.

Description

technical field [0001] The invention belongs to the technical field of high-wire steel rolling, and in particular provides a rough rolling method for improving the core structure of high-carbon steel wire rods, which is suitable for process optimization in the process of developing large-scale high-carbon steel wire rod varieties in high-wire workshops. Background technique [0002] Continuous casting of billets to produce high-carbon steel wire rods has become a widely popularized technology in the metallurgical industry. Its biggest advantages are high production efficiency, simple continuous casting process equipment, and eliminating the need for billets. Pyrotechnic process. However, high-carbon steel wire rods made from one fire are limited by the compression ratio. During the user's use, the drawability of the wire rod often occurs due to insufficient deformation of the core, coarse grains, and insufficient diffusion of segregated elements. bad. [0003] The improvem...

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Problems solved by technology

[0008] The purpose of the present invention is to provide a rough rolling method for improving the core structure of high-carbon steel wire rods, and solve the problem of how to improve the core structure of the rolled material and refine the core structure in the process of continuously casting billets to produce high-carbon steel wire rods, effectively alleviating the The loose center of the continuous casting billet is inherited to the poor density of the center structure of the large-scale high-carbon steel wire rod, and the limitation of the small billet compression ratio to the improvement of the performance of the rolled product

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