Large single magnetic sample making method for electrical steel magnetic property detection

A technology of electrical steel sheet and production method, which is applied in the direction of magnetic property measurement and hysteresis curve measurement, etc., can solve the problems of short service life, unsuitable long-term stability of monitoring and testing equipment, poor wear resistance of electrical steel surface coating, etc. Achieve long-term stability of magnetic properties, no component segregation, consistent metallographic structure and stress state

Inactive Publication Date: 2016-06-08
SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE
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Problems solved by technology

Generally, large single-piece magnetic standard samples are made of electrical steel plates. Due to the poor wear resistance and short service life of the electrical steel surface coating, it is not suitable for long-term stability of monitoring and testing equipment.

Method used

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  • Large single magnetic sample making method for electrical steel magnetic property detection

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Embodiment Construction

[0011] The method for making a large single-piece magnetic standard sample used in the detection of the magnetic properties of electrical steel sheets in the present invention adopts the finishing temperature of hot rolling at 910-920°C, the coiling temperature at 610-620°C and the annealing temperature after cold rolling at 810-820°C. ℃ smelting ultra-low-carbon rolled and chrome-plated steel coils with a carbon content of 0.0018%, trimming the rolled steel coils into long steel sheets, and dividing the long steel sheets into several square steel sheets to obtain Large monolithic magnetic standards produced in batches.

[0012] Further, both sides of the rolled steel coil are cut off by no less than 300 mm.

[0013] Further, the side length of the several square steel sheets is 500 mm.

[0014] Further, several square steel sheets are placed in an environment with a temperature difference of less than 1°C for more than 720 hours.

[0015] During the rolling process of the u...

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Abstract

The invention discloses a large single magnetic sample making method for electrical steel magnetic property detection. According to the method, an ultra-low-carbon rolled and chrome-plated steel coil of which the final hot-rolling temperature is 910-920 DEG C, the coiling temperature is 610-620 DEG C, the annealing temperature after cold rolling is 810-820 DEG C and the smelting carbon content is 0.0018% is selected, the rolled steel coil is trimmed into a long steel sheet, the long steel sheet is segmented into a plurality of square steel sheets, and thus, batch-made large single magnetic samples are obtained. The making method is simple and convenient, ensures that large single magnetic samples have no composition segregation, are consistent in metallographic structure and stress state and have magnetic performance of long-term stability, improves the surface wear resistance, and guarantees the reliability and stability of magnetic property detection.

Description

technical field [0001] The invention relates to a method for making a large single-chip magnetic standard sample for testing the magnetic properties of electrical steel sheets. Background technique [0002] Generally, the magnetic properties of electrical steel sheets are tested by a tester, and the magnetic performance parameters such as the basic magnetization curve, hysteresis loop and loss curve of electrical steel sheets can be obtained. At the same time, various parts of the entire steel sheet can be detected to obtain magnetic property distribution parameters. The main factors affecting the measurement results of the tester are current, voltage, magnetic circuit length, the degree of closeness between the yoke and the sample, etc. The long-term stability of the tester is monitored by a magnetic standard sample, and it is better to use a large single-chip magnetic standard sample. Comprehensively reflect the state of the measuring instrument to ensure the quality of m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/12G01R33/14
Inventor 李和平周星沈杰田慧玲
Owner SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE
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