Laser-nicked high-magnetic-induction oriented silicon steel and manufacturing method thereof

Abstract

The invention discloses laser nicking high-magnetic-induction oriented silicon steel and a manufacturing method thereof, laser nicking is carried out on the surface of oriented silicon steel, an irradiation laser beam is an oval beam, the long axis of the irradiation laser beam is approximately perpendicular to the rolling direction of a steel plate, and continuous overlapping irradiation is formed on the surface of the steel plate at approximately equal intervals; therefore, the iron loss characteristic of the oriented silicon steel is improved; a laser source of the irradiation laser beam is a CO2 gas continuous wave laser source, the laser output power is smaller than or equal to 3000W, the laser scanning speed is larger than or equal to 150m / min, and the scanning interval is 3-7mm. Through reasonable matching of laser power, scanning speed and the like, irradiation energy density is controlled, it is guaranteed that the iron loss improvement rate stably reaches 7%-14%, surface irradiation damage cannot be generated, magnetostriction performance is excellent, the comprehensive performance of the transformer can be greatly improved, the method is suitable for high-speed and large-scale continuous machining, and the production cost can be reduced.

Description

technical field [0001] The invention belongs to the technical field of oriented silicon steel manufacturing, and relates to a laser scoring high magnetic induction oriented silicon steel and a manufacturing method thereof. Background technique [0002] Grain-oriented silicon steel is the basic material used in the manufacture of transformer equipment. Transformers consume a lot of electric energy due to iron loss. Therefore, reducing iron loss is the unremitting goal of producing grain-oriented silicon steel. The iron loss of silicon steel sheet can be divided into hysteresis loss and eddy current loss. Eddy current loss can be further divided into classical eddy current loss (caused by eddy current) and abnormal eddy current loss (caused by magnetic wall motion, which is proportional to the magnetic domain width). Under the condition of power frequency, the abnormal eddy current loss accounts for about half of the iron loss. With the development of metallurgical technology...

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Problems solved by technology

[0010] The purpose of the present invention is to provide a laser-marked high magnetic induction oriented silicon steel and its manufacturing method, which can reduce the problem of traditional continuous laser magnetostriction increase, and will not produce bending deformation, and the coating will not be damaged after scoring. No need to re-coat, suitable for high-speed, continuous processing of laser processing steps, can ensure excellent overall performance of the product

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