Method for eliminating single-side wave defects of oriented silicon steel

Abstract

The invention discloses a method for eliminating single-side wave defects of oriented silicon steel. The method comprises the following steps that 1) a special cover plate is manufactured, wherein the special cover plate comprises an annular plate, and a plurality of cut-off positions are arranged on the outer edge of the annular plate; 2) an oriented silicon steel coil to be charged is hoisted to a high-temperature annealing furnace platform; 3) the special cover plate is laid on the outer ring of the upper end face of the oriented silicon steel coil; 4) all the cut-off positions on the special cover plate are bent downwards, and the outer edge of the oriented silicon steel coil is hooked; 5) an inner cover is buckled, and the bottom edge of the inner cover is subjected to sand sealing; and 6) the steel coil enters the furnace, and the high-temperature annealing process is completed. According to the method, the edge of the steel coil can be effectively protected, and the upper end face of the steel coil is prevented from flanging; and according to the method, water in the steel coil can be discharged, and surface oxidation of the steel strip is avoided.

Description

Technical field[0001]The present invention belongs to the field of metallurgy, and in particular, the present invention relates to a method of eliminating oriented silicon steel mono-wavy defects in high temperature annealing steps of silicon steel.Background technique[0002]Orientation silicon steel is also known as cold-rolled transformer steel, is an important silicon alloy applied to manufacturing transformer core. Due to its complex production process, the manufacturing technology is strict, the process is long, which has always been a tower product in the steel industry. It is known as the steel art items. When the user makes a transformer core using oriented silicon steel, it is necessary to cut, laminated, and the steel belt type is poor, which will affect the mass of the laminate, reduce transformer performance, and therefore, the user is very strict on the orientation silicon steel plate. At present, the outgoing volume of the alignment silicon steel is annealing, and the u...

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Problems solved by technology

[0004] For the protection of the upper end surface of the high-temperature annealed steel coil, the problem of derived defects should also be considered, that is, while eliminating the flanging, no new defects can be generated. The typical derived defect is the oxidation of the steel strip surface. The feasibility is lost due to the breeding of oxidation defects. The reason is that the drainage of the steel coil is blocked during the heating process, so that the water vapor accumulates locally in the steel coil, thereby destroying the reducing atmosphere in this part and causing oxidation.

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