Method of manufacturing oriented silicon steel strip in razor-thin

A manufacturing method and technology of oriented silicon steel, which is applied in the direction of manufacturing tools, metal rolling, metal rolling, etc., can solve the problems that affect the operation rate and hourly output, the silicon steel sheet is brittle, and the magnetic performance is not high, so as to reduce broken edges and The effect of broken belt phenomenon, large reduction rate and stable magnetic performance

Inactive Publication Date: 2007-01-17
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Although very thin strips of silicon steel can be made by this method, due to the high brittleness of silicon steel sheets, it brings great difficulties to cold rolling. Accidents such as edge cracking, strip breaking, and roll wrapping often occur, which affect the operating rate and hourly output, and also affect the cost. , the magnetic performance is not high, and it is very unstable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The 0.3mm thick secondary recrystallized finished oriented silicon steel is used as raw material, and its chemical composition is (mass fraction,%): C0.02, Si3.12, Mn0.12, S0.02, Cu0.01, N0.01, P2 +H 2 (1:3) Annealing at 950°C for 10 minutes in a mixed atmosphere annealing furnace. The magnetic properties of the strips after annealing were measured using ring samples. B 10 At 1.93T, P 15 / 400 =13W / Kg.

Embodiment 2

[0021] The 0.3mm thick secondary recrystallized finished oriented silicon steel is used as raw material, and its chemical composition is (mass fraction,%): C0.01, Si3.10, Mn0.085, S0.03, Cu0.01, N0.001, P0.009, I Fe. After pickling to remove the surface insulation layer, on a four-roll asynchronous cold rolling mill 90mm / 200mm×200mm, cold rolling to 0.08mm by asynchronous speed ratio 1.17 rolling method, and 850 ° C in a pure hydrogen annealing furnace for 20 minutes annealing. The magnetic properties of the strips after annealing were measured using ring samples. B 10 At 1.98T, P 15 / 400 =14W / Kg.

Embodiment 3

[0023] The 0.3mm thick secondary recrystallized finished oriented silicon steel is used as raw material, and its chemical composition is (mass fraction,%): C0.02, Si3.13, Mn0.06, S0.002, Cu0.01, N0.004, P10 At 1.94T, P 15 / 400 = 11W / Kg.

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Abstract

A process for preparing the very-thin oriented silicon steel band with high and stable magnetic property includes such steps as acid washing of recrystallized and oriented silicon steel plate, cold rolling to make its thickness reach 0.06-0.1 mm, heat treating at 700-980 deg.C in protective atmosphere, coating and annealing.

Description

technical field [0001] The invention belongs to the technical field of metal strip rolling, in particular to a method for manufacturing an ultra-thin strip of grain-oriented silicon steel. Background technique [0002] Silicon steel is an indispensable and important functional material in the electric power, motor, and electronics industries. Grain-oriented silicon steel is mainly used as a soft magnetic material for iron cores such as electrical machinery and transformers. With the development of the electronics industry, the requirements for silicon steel sheets are becoming more and more stringent. From the viewpoint of energy saving, it is always desired to increase the magnetic induction and reduce the iron loss. Especially since 1970, the iron loss of grain-oriented silicon steel sheet has been continuously reduced, and the output and quality have been greatly improved, but there is still room for further reduction of iron loss of silicon steel sheet. The measures ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/22B21B45/02B05D7/14C21D9/52
Inventor 高秀华齐克敏邱春林刘恩
Owner NORTHEASTERN UNIV LIAONING
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