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Preparation method of thin-strip continuous casting low-magnetic anisotropy non-oriented silicon steel

A technology of magnetic anisotropy, oriented silicon steel, applied in the field of metallurgy, can solve the problem of affecting the rotation loss of the motor, not involving the anisotropy of magnetic properties, etc., to achieve low production cost, low anisotropy, and improved plate shape and plasticity. Effect

Active Publication Date: 2018-06-26
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the above technologies all improve the magnetic properties of non-oriented silicon steel to varying degrees, they do not involve the anisotropy of magnetic properties, and the anisotropy of silicon steel properties will affect the rotation loss of the motor, which is the key to whether the electric equipment can obtain excellent characteristics. one of the key factors

Method used

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  • Preparation method of thin-strip continuous casting low-magnetic anisotropy non-oriented silicon steel
  • Preparation method of thin-strip continuous casting low-magnetic anisotropy non-oriented silicon steel
  • Preparation method of thin-strip continuous casting low-magnetic anisotropy non-oriented silicon steel

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Effect test

Embodiment 1

[0031] In this embodiment, the preparation method of thin strip continuous casting low magnetic anisotropy non-oriented silicon steel is carried out according to the following steps:

[0032] According to chemical composition (mass percentage) C 0.004%, Si 1.4%, Mn 0.10%, Al 0.4%, S0.003%, N0.003%, Sn 0.03%, P 0.008%, Nb+V+Ti≤0.008%, The rest is Fe. The molten steel is smelted. The superheated degree of the molten steel is 55°C. It is cast and rolled into a 1.70mm cast strip by a thin strip continuous casting machine. The casting rolls in the casting and rolling process are copper rolls.

[0033] On-line hot rolling is carried out after the cast strip is rolled out, the hot rolling start temperature is 1020°C, the total hot rolling reduction is 55%, and it is cooled to room temperature after being crimped at 450°C. figure 2 It is the metallographic structure of cast strip hot-rolled sheet, image 3 It is the macroscopic texture of hot-rolled cast strip. It can be se...

Embodiment 2

[0051] In this embodiment, the preparation method of thin strip continuous casting low magnetic anisotropy non-oriented silicon steel is carried out according to the following steps:

[0052] According to chemical composition (mass percentage) C 0.004%, Si 2.0%, Mn 0.2%, Al 0.4%, S0.004%, N 0.003%, Sn 0.05%, P 0.01%, Nb+V+Ti≤0.008%, the rest For Fe. The molten steel is smelted, the superheated degree of the molten steel is 70°C, and it is cast and rolled into a 2.5mm cast strip by a thin strip continuous casting machine. The casting rolls in the casting and rolling process are copper rolls.

[0053] On-line hot rolling is carried out after the cast strip is rolled out, the hot rolling start temperature is 1180°C, the total reduction of hot rolling is 64%, and it is cooled to room temperature after being crimped at 500°C.

[0054] The hot-rolled cast strip was pickled to remove scale, and then cold-rolled to 0.50mm, with a cold-rolling reduction of 59%.

[0055] Col...

Embodiment 3

[0060] In this embodiment, the preparation method of thin strip continuous casting low magnetic anisotropy non-oriented silicon steel is carried out according to the following steps:

[0061] According to chemical composition (mass percentage) C 0.003%, Si 1.7%, Mn 0.06%, Al 0.3%, S0.003%, N 0.003%, Sn 0.03%, P 0.005%, Nb+V+Ti≤0.008%, the rest For Fe. The molten steel is smelted, the superheat of the molten steel is 40°C, and it is cast and rolled into a 2.0mm cast strip by a thin strip continuous casting machine. The casting rolls in the casting and rolling process are copper rolls.

[0062] On-line hot rolling is carried out after the cast strip is rolled out, the hot rolling start temperature is 1100°C, the total hot rolling reduction is 52%, and it is cooled to room temperature after being crimped at 480°C.

[0063] The hot-rolled cast strip was pickled to remove scale, and then cold-rolled to 0.50mm with a reduction of 48%.

[0064] Cold-rolled sheet at 40% N ...

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Abstract

The invention belongs to the technical field of metallurgy, and particularly relates to a preparation method of thin-strip continuous casting low-magnetic anisotropy non-oriented silicon steel. The non-oriented silicon steel comprises, by mass, less than or equal to 0.004% of C, 1.4-2.0% of Si, 0.05-0.2% of Mn, 0.1-0.4% of Al, less than or equal to 0.005% of S, less than or equal to 0.005% of N, less than or equal to 0.05% of Sn, less than or equal to 0.01% of P, less than or equal to 0.008% of Nb, V and Ti and the balance iron. The preparation method comprises the steps of smelting molten steel and carrying out thin-strip continuous casting to obtain a cast strip with the thickness of 1.5-2.5 mm; carrying out online hot rolling after the cast strip is separated from a roller with total rolling reduction of hot rolling of 50-65%, and then carrying out curling; carrying out cold rolling on the cast strip subjected to hot rolling after pickling with rolling reduction of 45-60%; and carrying out annealing on a cold rolling plate for 4-8 minutes at the temperature of 800-1000 DEG C, then cooling the cold rolling plate to the room temperature at the speed of 50 DEG C / s, and next carrying out coating treatment to obtain the thin-strip continuous casting low-magnetic anisotropy non-oriented silicon steel with the circumferential average magnetic inductance value of larger than or equal to 1.70T and anisotropy less than 5%.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, in particular to a method for preparing thin strip continuous casting low magnetic anisotropy non-oriented silicon steel. Background technique [0002] Non-oriented silicon steel is an important soft magnetic material, which is mainly used in the preparation of iron cores for various motors and generators. The motor works in the running state. In order to reduce the energy loss in the working process, the silicon steel plate is required to have excellent magnetic properties and magnetic isotropy. However, there will always be a certain magnetic anisotropy in the actual product, which may increase the energy loss of the motor during operation or cause false alarms. [0003] For polycrystalline materials, it will show a certain texture during the deformation and recrystallization process, so that the magnetic properties of the material in the horizontal and vertical directions have certain diff...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C21D8/12C21D1/26
CPCC21D1/26C21D8/1222C21D8/1233C21D8/1272C22C38/001C22C38/004C22C38/008C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14
Inventor 焦海涛许云波徐海洁程思飞曹光明李成刚李建平
Owner NORTHEASTERN UNIV
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