A Method for Controlling Coarse Grain Cracks on the Surface of High-Wire Wire Rod

Abstract

The invention discloses a method for controlling high speed wire rod surface clamp mark coarse grains, and belongs to the technical field of steel rolling. According to technological steps and controlled technical parameters, the speed of an outlet of a finishing mill is controlled to range from 80 m / s to 86 m / s, the overstepping coefficient of a wire feeding machine is controlled to range from 1.01 to 1.03, five sections of water tanks are adopted for cooling after finish rolling is performed, the cooling temperature drop of the first three water tanks is controlled to range from 40 DEG C to 50 DEG C, the shaking amplitude of a wire rod in the cooling process is controlled to range 10 mm to 25 mm, the tail clamping pressure is controlled to range from 0.20 Mpa to 0.24 Mpa, the closed degree is controlled to range from 0.55 mm to 0.65 mm, and the wire feeding temperature is controlled to range from 880 DEG C to 900 DEG C. By optimizing technological parameters in the rolling process, on the technological condition that tail clamping and feeding are adopted in the whole rolling process, rolling and wire feeding of the wire rod can be effectively controlled and stabilized, and control over the high speed wire rod surface clamp mark coarse grains is achieved; on the one hand, the wire rod surface quality is improved; on the other hand, control over structure uniformity is achieved, and the product performance is optimized; the method is quite suitable for optimizing the wire rod structure performance and improving the product quality in a high speed wire rod factory.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, and in particular provides a hot rolling method for controlling the coarse-grain structure of pinch marks on the surface of high-speed wire rods, which is suitable for high-speed wire rod factories to optimize the production process of wire rod product quality and improve the comprehensive mechanical properties of wire rods And surface quality, dimensional accuracy. Background technique [0002] Surface quality control, dimensional accuracy and tissue performance have always been the focus of high-end factories. Especially in the current deep processing industry where the amount of drawing deformation is increasing, the drawing speed is increasing, the heat treatment of the intermediate wire is reduced, and the wire breakage rate is strict, how to further improve the surface quality and microstructure of the wire rod has become the main aspect of the steel rolling process research. [0003...

AI Technical Summary

Problems solved by technology

This requires not only precise process control of the rolling process, but also an in-depth analysis of the cooling process. As we all know, the chilling of the high-wire water tank will cause the vibration of the wire rod, which seriously affects the stability of the pinch roller clamping process.

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