Medium-high carbon steel hot-rolled wire rod and production method thereof

Abstract

The invention discloses a medium-high carbon steel hot-rolled wire rod and a production method thereof. According to the production method, a blank is prepared into the wire rod through heating, hot rolling and stelmor cooling, the carbon content of the blank is larger than or equal to 0.45%, and the soaking section temperature of the heating procedure ranges from 1,140 DEG C to 1,250 DEG C; the hot rolling procedure comprises rough rolling, intermediate rolling, pre-finish rolling, finish rolling and spinning in sequence, and the initial rolling temperature is 1,030-1,100 DEG C; the spinningtemperature is 900-950 DEG C; the hot rolling procedure further comprises water cooling before finish rolling with the water flow being 1,200-1,800 L / min and 400-600 L / min in sequence, water cooling in finish rolling with the water flow being 20-100 L / min and the water pressure being 0-0.3 bar, and water cooling after finish rolling with the water flow being 1,200-1,800 L / min, 400-600 L / min and 900-1,200 L / min in sequence; and in the Stelmor cooling procedure, the speed of a roller way at an inlet section is 0.6-0.8 m / s, the first one or two fans and heat preservation covers are stopped, the continuous 6-13 fans and heat preservation covers behinds are started, all the fans and heat preservation covers behinds are stopped, and the air volume of the started fans is 50-100%. The obtained wire rod is excellent in structure and performance, the surface oxide scale is controlled, the bubble problem is avoided, and the wire rod is suitable for mechanical husking.

Description

technical field [0001] The invention belongs to the technical field of steel production and manufacturing, and specifically relates to a production method of medium-high carbon steel hot-rolled wire rod, especially a production method of medium-high carbon steel hot-rolled wire rod suitable for mechanical peeling, and also relates to a production method based on A medium-high carbon steel hot-rolled wire rod prepared by the production method. Background technique [0002] Various steel wire products produced from wire rods are widely used in many aspects of society, such as automobiles, communication cables, bridges, construction machinery and other fields. Therefore, the performance requirements of wire rods are very strict. It determines the quality of steel wire products. [0003] Usually the wire rod is rolled at high temperature, and the surface of the wire rod will inevitably form a certain thickness of iron oxide scale. Before further drawing and other deep processi...

AI Technical Summary

Problems solved by technology

However, because the pickling removal method will produce a large amount of waste acid and waste gas, causing environmental pollution, therefore, in production, it is more and more inclined to abandon the pickling method and use more environmentally friendly mechanical peeling methods to remove wire rods Iron oxide scale on the surface

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