System and method for cooling high-carbon steel wire rod after rolling

A cooling system and cooling method technology, applied in metal rolling, metal rolling, workpiece surface treatment equipment, etc., can solve the problem of uneven cooling of wire rod 2, high proportion of upper bainite, and large fluctuation of microstructure, etc. question

Active Publication Date: 2012-05-16
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology

However, due to the fact that the distribution of the wire rod on the roller table is different from the theoretical situation in actual production, please refer to the attached figure 1 As shown, the two sides of the wire rod 2 rolled by the laying machine 1 are not neat and uniform, and the cooling of each area of ​​the wire rod 2 is uneven, especially the outer part of the overlapping area H is over-cooled, resultin

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  • System and method for cooling high-carbon steel wire rod after rolling
  • System and method for cooling high-carbon steel wire rod after rolling
  • System and method for cooling high-carbon steel wire rod after rolling

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Embodiment Construction

[0030] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] see figure 2 As shown, the high carbon steel wire rod post-rolling cooling system of the present invention includes a Steyrmo control cooling device 10 located at the outlet side of the laying head 1, for performing Steyrmo cooling on the wire rod 1 entering its area. Cooling (its structure and cooling principle are basically the same as the traditional Stelmore cooling, so I won't go into details here). The cooling system also includes an air mist pre-cooling device 20, which is arranged on the roller table 3 between the laying head 1 and the first cooling fan 11 of the Stelmo control cooling device 10, and the disc discharged to the laying head 1 The overlapping area H of the strip 2 sprays mist for cooling, and forms a forced convection steam film on the surface of the wire rod in the overlapping area H to control ...

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Abstract

The invention discloses a system for cooling a high-carbon steel wire rod after rolling. The device comprises a Stelmor controlled cooling device and a gas fog pre-heating device, wherein the gas fog pre-heating device is arranged on a roller path between a laying head and the Stelmor controlled cooling device. The invention further discloses a method for cooling a high-carbon steel wire rod after rolling. The method comprises the following steps of: controlling the temperature difference among different areas of a rod body to be below 100 DEG C by using the high thermal conductivity of convection vapor during gas fog pre-cooling; and entering the Stelmor controlled cooling device at the temperature of 650-750 DEG C for performing Stelmor cooling. Compared with a wire rod subjected to salt treatment, the finally obtained wire rod in the invention has the advantages that: the mechanical performance and microscopic structure are very close, the tensile strength of cold drawing can be met, and environmental pollution is greatly lowered.

Description

[0001] technical field [0002] The invention relates to wire rod cooling technology, more specifically, to a cooling system and method for high-carbon steel wire rod after rolling. [0003] Background technique [0004] At present, there are two existing post-rolling cooling processes for high-carbon steel wire rods, one is the Stelmore controlled cooling method, and the other is the salt bath treatment process. The former is the most popular and widely used in the world. By adjusting the air volume of the cooling fan and the distribution of the air volume in the direction perpendicular to the running direction of the wire rod, it assists the wire rod drop device and the speed difference of different groups of roller tables. To control the microstructure and performance of wire rod, although it has little impact on the environment, it can only meet the general requirements of high-carbon steel wire rod production, but cannot produce high-performance wire rod with high tens...

Claims

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Application Information

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IPC IPC(8): B21B45/02B21B37/74
Inventor 胡东辉
Owner BAOSHAN IRON & STEEL CO LTD
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