Method for preventing periodic pitch lines from being generated on surface of high-speed wire rod

Abstract

The invention discloses a method for preventing periodic pitch lines from being generated on the surface of a high-speed wire rod, and the method specifically comprises the steps: S1, carrying out the out-of-roundness detection of the bottom of a roll collar groove and the side wall of the roll collar groove through a cylindricity instrument before operation, and guaranteeing that the maximum out-of-roundness needs to be smaller than or equal to 5 [mu] m; s2, before operation, the period of out-of-roundness is detected, and it is guaranteed that the numerical value of the period of out-of-roundness needs to be smaller than 27 or larger than 28; s3, in the operation process, the rolling line shape, the steel stacking coefficient and the steel stacking and pulling coefficient are measured; measuring once per hour, and recording; s4, during operation, the high-speed wire rod is regularly inspected in a spot mode, and the finish rolling inlet temperature and the spinning temperature are immediately increased if periodic pitch lines exist on the surface of the wire rod; and if the periodic pitch lines cannot be eliminated, the machine is stopped to replace the roll collar. According to the invention, the cylindricity instrument is introduced to detect the out-of-roundness of the roll collar, so that the influence of the machining precision of the roll collar on the quality of the high-speed wire rod is eliminated, and periodic pitch lines on the surface of the wire rod are effectively prevented.

Description

technical field [0001] The invention relates to the field of steel rolling, in particular to a method for preventing periodic nodule on the surface of high-speed wire rods. Background technique [0002] Wire rod refers to hot-rolled round steel with a diameter of 5-22mm or special-shaped steel with a cross-section equivalent to this. It is also called wire rod because it is delivered in the form of wire rod. The perimeter of the wire rod section is very small, and the common product specification diameter is 5-13mm. According to the different rolling mills, it can be divided into two types: high-speed wire rod (high wire) and ordinary wire rod (common wire). [0003] High-speed wire rod refers to the wire rod rolled by "high-speed twist-free rolling mill". The rolling speed is 80-160 m / s, the weight of each piece is 1.8-2.5 tons, and the dimensional tolerance accuracy is high, which can reach 0.02mm. During the rolling process, the process parameters can be adjusted to ensu...

AI Technical Summary

Problems solved by technology

[0004] During the production of high-speed wire rods, periodic knot patterns sometimes appear on the surface of the finished high-speed wire rods, which are in the shape of slub mottled. Although there is no abnormality in the structure of metallographic analysis, the production pace of high-speed wire rods is fast, the coils are large, and the packaging is usually tight. The appearance quality and sales volume of finished products with bamboo spots are not good, which has a great impact on the economic benefits of the enterprise.

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