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Improved type production technology of high-magnetic-inductivity non-orientation silicon steel sheet

A technology of oriented silicon steel and production process, which is applied in the field of production process of improved high magnetic induction non-oriented silicon steel sheet, can solve the problems of high production cost, low magnetic induction of silicon steel sheet, low production efficiency, etc., and achieve the effect of improving process efficiency

Inactive Publication Date: 2017-11-24
ZHEJIANG HUAYING STEEL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an improved production process of high magnetic induction non-oriented silicon steel sheet, which solves the problems of low magnetic induction of silicon steel sheet produced in the prior art, low production efficiency, high energy consumption, and high production cost.

Method used

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  • Improved type production technology of high-magnetic-inductivity non-orientation silicon steel sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Raw materials: hot-rolled coils made of Q235 steel billet.

[0045] Normalizing treatment: heat the hot-rolled steel strip to 800°C for 40 minutes.

[0046] After pickling, it is cold-rolled into thin coils with a thickness of 0.50mm, and the composition is: C<0.12%, Si<0.31%, Mn<0.11%, P<0.025%, S<0.025%, Al<0.04%;

[0047] Pretreatment agent: a concentration of 18% sulfurized silicate aqueous solution;

[0048] Protective gas: 60% nitrogen + 23% hydrogen

[0049] Decarburization annealing: Put the cold-rolled steel plate coated with the pretreatment agent into a hydrogen-nitrogen mixed gas furnace for annealing and decarburization annealing. The annealing temperature is 830 degrees, and the time in the furnace is 6 minutes. Atmosphere dew point temperature is 40°C

[0050] Detection: the C content in the steel plate is reduced to 49.9ppm, and the magnetic properties of the obtained high magnetic induction silicon steel sheet are: P15=5.20W, B50=1.90T.

Embodiment 2

[0052] Raw materials: hot-rolled coils made of Q235 steel billet.

[0053] Normalizing treatment: heat the hot-rolled steel strip to 850° C. for 60 minutes.

[0054] After pickling, it is cold-rolled into a thin coil with a thickness of 0.45mm, and the composition is: C<0.14%, Si<0.30%, Mn<0.12%, P<0.025%, S<0.025%, Al<0.04%;

[0055] Pretreatment agent: a 30% sulfurized silicate aqueous solution;

[0056] Protective gas: 55% nitrogen +30% hydrogen;

[0057] Decarburization annealing: Put the cold-rolled steel plate coated with the pretreatment agent into a hydrogen-nitrogen mixed gas furnace for annealing and decarburization annealing. The annealing temperature is 850 degrees, and the annealing (holding) time is 1.5 hours.

[0058] Detection: the C content in the steel plate is reduced to 50ppm, and the magnetism of the obtained high magnetic induction silicon steel sheet is: P15=5.22W, B50=1.91T.

[0059] The verification results show that the method improves the magnetic...

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Abstract

The invention discloses an improved type production technology of a high-magnetic-inductivity non-orientation silicon steel sheet. The improved type production technology of the high-magnetic-inductivity non-orientation silicon steel sheet comprises the following steps that S101, a steel billet is made into a hot-rolled strip coil; S102, the hot-rolled strip coil is normalized, then acid pickling is conducted on the hot-rolled strip coil, and then hot-rolled strip coil is made into a thin strip coil through cold rolling; S103, the cold-rolled strip coil is coated with a pretreating agent; S104, decarburization annealing is conducted through a hydrogen-nitrogen mixed gas furnace; S105, small-reduction-rate cold rolling is conducted after annealing; S106, the strip coil is coated with an insulating film; and S107, a finished product is obtained. The improved type production technology of the high-magnetic-inductivity non-orientation silicon steel sheet solves the problems that a silicon steel sheet produced in the prior art is low in magnetic inductivity, low in production efficiency, high in energy consumption, high in production cost and the like.

Description

technical field [0001] The invention belongs to the technical field of silicon steel production, and in particular relates to a production process of an improved high magnetic induction non-oriented silicon steel sheet. Background technique [0002] Silicon steel is a ferrosilicon alloy. The sheet rolled with silicon steel is the most widely used soft magnetic material in the electrical field, so silicon steel sheet is also called electrical steel sheet; silicon steel sheet is widely used in motors, generators, transformers, choke coils, electromagnetic mechanisms, relays and measurement meter. [0003] The main purpose of cold-rolled non-oriented silicon steel sheet is for the manufacture of generators, so it is also called cold-rolled electrical silicon steel. Non-oriented silicon steel sheet is a silicon steel sheet that forms a non-oriented deformed crystal structure according to a certain production process. [0004] The development trend of miniaturization and high e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/12
CPCC21D8/1222C21D8/1233C21D8/1255C21D8/1266
Inventor 吕伟龙沈志惠吕遥超杨新淼
Owner ZHEJIANG HUAYING STEEL TECH CO LTD
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