A Salvage Repair Method for Thin Gauge Flat Roll Defects

Abstract

The invention belongs to the technical field of ferrous metallurgy rolling, and particularly relates to a remedying and repairing method for a flaw of a thin-specification flat roll. The method specifically comprises the following steps that a, the inner diameter of the flat roll is measured; b, the direction of the flat roll is adjusted; c, the inner diameter of the flat roll is subjected to external force correction; d, the flat roll is manually coiled to a coiling block of an uncoiler, and coiling is finished; and e, production control parameters of the flat roll are input. The remedying and repairing method solves the problems that due to thin-specification steel roll rolling abnormality, in the horizontal stacking and cooling process, the inner diameter of an inner ring of a flat roll formed in the manner that an inner ring of a steel roll collapses is irregular, the flat roll cannot get on a unit to be remedied or sold externally, and consequently the product can only be judged to return to a furnace, and the technology control level of a flat roll splitting unit is improved. The technology control technique is widely applied, delivery of externally entrusted products on schedule is ensured, the production cost is reduced, and the operation current situation that according to a conventional flat roll treatment operation manner, a large amount of labor / a large number of material resources are consumed, time is long, and serious safety hidden danger exists is avoided.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgical rolling, and in particular relates to a rescue and repair method for defects of thin-gauge flat coils. Background technique [0002] In the process of rolling thin gauge (h≤2.0mm) in the hot rolling process, due to reasons such as high coiling temperature and low coiling tension setting, the inner ring of the steel coil collapses to form a flat coil. However, during the stacking and cooling process of normal rolled thin-gauge steel coils, because the horizontal stacking is adopted, the inner ring of the steel coils will also collapse to form flat coils. The flat coil defect means that the inner diameter of the steel coil changes greatly, the length in the horizontal direction increases, and the length in the vertical direction decreases, and the appearance is like a "lying egg". Such defective steel coils can neither be rescued by the unit nor sold outside, and can only be sc...

AI Technical Summary

Problems solved by technology

Such defective steel coils can neither be rescued by the unit nor sold outside, and can only be scrapped and returned to the furnace

It not only increases the production cost of the process, but also brings many difficulties to the subsequent scrap steel treatment