Method for preventing rolled hot steel billet from bending

Abstract

The invention provides a method for preventing a rolled hot steel billet from bending. The method is characterized in that the temperature is kept at 1250+ / -10 DEG C during heating and rolling steel ingots; the interval of the steel ingots in a soaking furnace is 1300-1800mm; the steel flattening pass reduction is controlled to be 0-10 mm; the steel billets are stacked in a shape like the Chinesecharacter 'jing', and the shape of a steel billet stack is a cube. According to the method for preventing the rolled hot steel billet from bending, by optimizing the steel billet from the links of heating, rolling, stacking, cooling and the like, it is ensured that on the basis without a straightening device, the curvature of the rolled steel billet is controlled to be within 3 mm / m, and the problem that large curvature causes a low production efficiency and prolongs delivery time is solved.

Description

technical field [0001] The invention belongs to the field of shape control of rolled billets. Background technique [0002] The bending phenomenon of rolled billet is mainly formed in the later stage of rolling. On the one hand, due to the uneven temperature in the heating process of the steel ingot, the temperature of the part with the difference in heating temperature in the later stage of rolling enters the two-phase region (A+F) first, and the deformation structure is difficult to control; The difference in temperature between billets causes stress bending. [0003] On the basis of no car straightening equipment in this production line, the steel billet is bent, which causes great inconvenience to the user's use process. The seriously bent steel billet can only be cut into pieces to reduce the bending degree of the whole piece, or downgrade use. This increases the labor intensity of the production process and affects the market competitiveness of steel billets. Cont...

AI Technical Summary

Problems solved by technology

On the one hand, due to the uneven temperature in the heating process of the steel ingot, the temperature of the part with the difference in heating temperature in the later stage of rolling enters the two-phase region (A+F) first, and the deformation structure is difficult to control; The difference in temperature between billets causes stress bending

[0003] On the basis of no car straightening equipment in this production line, the steel billet is bent, which causes great inconvenience to the user's use process. The seriously bent steel billet can only be cut into pieces to reduce the bending degree of the whole piece, or downgrade use

Increase the labor intensity of the production process and affect the market competitiveness of steel billets