A Method of Avoiding Burr Defects on the Edge of Ultra-low Carbon Steel

Abstract

The invention relates to a method for avoiding the burr defect of the ultra-low carbon steel edge. The weight percentage of C in ultra-low carbon steel is less than 0.0035%. The method specifically includes the following steps that the installation accuracy of a water cutting board and a guide device on rough rolling R1 and R2 mills are improved; the cooling water pressure of each rack in a roughrolling area, the diameter of vertical roll body water nozzle, the spray angle and the forward slip value are controlled; at the times of rough rolling, the heating tapping temperature, the rough rolling outlet temperature, the intermediate billet thickness, the reduction rate of each rack in finish rolling, the side pressure amount and the vertical roll rolling force are controlled. The method can effectively improve the edge quality of ultra-low carbon hot rolled strip steel, the subsequent cold rolling process production is prevented from being affected by the burr defect, the user requirement is met, meanwhile, the cold rolling repair is reduced, and the production cost of enterprises is reduced.

Description

technical field [0001] The invention relates to the technical field of steel rolling, in particular to a method for avoiding burr defects at the edge of ultra-low carbon steel. Background technique [0002] In the production process of steel plate or strip, various defects are easy to occur in the rolling process at the edge of the strip where the stress concentration and temperature change are severe, which will affect the overall quality of the strip and reduce the yield of the product, thereby reducing the cost of the enterprise. economic benefits. Therefore, how to avoid the edge defects of plate and strip has always been the research direction of technicians in the industry. [0003] Common edge defects of hot-rolled strip steel include the following: edge cracks, edge interlayers, and warped skins. There are many reasons for the defects. It can be said that every link in the production may affect the edge quality of the strip. In the early stage, we received an orde...

AI Technical Summary

Problems solved by technology

[0002] In the production process of steel plate or strip, various defects are easy to occur in the rolling process at the edge of the strip where the stress concentration and temperature change are severe, which will affect the overall quality of the strip and reduce the yield of the product, thereby reducing the cost of the enterprise. economic benefits