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A kind of non-oriented electrical steel under low magnetic field and its production method

A technology of oriented electrical steel and low magnetic field, which is applied in the field of non-oriented electrical steel and its production, can solve the problems of poor magnetization performance of non-oriented electrical steel, and achieve the effect of benefiting magnetization ability, prolonging the holding time and reducing the cooling rate

Active Publication Date: 2021-12-14
MAANSHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem of poor magnetization performance of non-oriented electrical steel under low magnetic field in the prior art, the present invention provides a non-oriented electrical steel under low magnetic field and its production method

Method used

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  • A kind of non-oriented electrical steel under low magnetic field and its production method
  • A kind of non-oriented electrical steel under low magnetic field and its production method
  • A kind of non-oriented electrical steel under low magnetic field and its production method

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Embodiment 1

[0048] In this implementation, a non-oriented electrical steel under low magnetic field includes the following components in weight percentage: C: 0.0019%, Si: 2.9%, Mn: 0.25%, P: 0.003%, Als: 0.85%, S : 0.001%, N: 0.0007%, Ti: 0.0015%, the rest is iron and unavoidable impurities; the production method of the non-oriented electrical steel under the low magnetic field is as follows:

[0049] Preparation of slab: adding molten iron to the RH furnace for refining and alloying treatment, adding various alloying elements according to the design requirements of the components; continuously casting the molten steel refined in the RH furnace into a slab with a thickness of 220mm;

[0050] Slab heating: the slab after continuous casting is cooled and then enters the heating furnace, the temperature of the heating furnace is 1180°C, and the time is 210min;

[0051] Hot-rolled coiling: the heated slab is rough-rolled to 34mm in 3 passes, finished in 7 passes to 2.0mm in thickness, and co...

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Abstract

The invention discloses a non-oriented electrical steel under low magnetic field and a production method thereof, belonging to the technical field of non-oriented electrical steel production. Aiming at the problem of poor magnetization performance of non-oriented electrical steel under low magnetic field in the prior art, the present invention provides a non-oriented electrical steel under low magnetic field, which includes the following components in weight percentage: C≤0.0020%, Si: 2.8~3.3%, Mn: 0.2~0.4%, P≤0.005%, Als: 0.2~0.9%, S≤0.001%, N≤0.0020%, Ti≤0.0015%, and the rest are iron and unavoidable impurities. And in the annealing step, the temperature is raised rapidly, the cooling rate is reduced, and the thermal method is used to prolong the holding time. Changes are made in the source of the composition and the annealing step, so that the magnetic induction B on the basis of the original high-grade composition 100 Increase 0.3T to reach iron loss P 1.5 / 50 ≤2.40W / kg, magnetic induction B 100 ≥1.2T, B 5000 ≥1.67T, which ensures that the non-oriented steel has high magnetization performance under low magnetic field, and the whole method is easy to operate, has high safety performance and low production cost.

Description

technical field [0001] The invention belongs to the technical field of non-oriented electrical steel production, and more specifically relates to a non-oriented electrical steel under a low magnetic field with strong magnetization performance under a low magnetic field and a production method thereof. Background technique [0002] As a soft magnetic material, cold-rolled non-oriented electrical steel is widely used in the manufacture of iron cores of various motors, such as small motors, compressors, and new energy vehicle drive motors. The performance requirements are slightly different due to different fields of application, but different Electric motors have high magnetic properties and good processing performance requirements for electrical steel. With the continuous improvement of the motor manufacturing technology of downstream users, such as the manufacturing process of high-efficiency compressors, servo motors and new energy drive motors, the requirements for better ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/14C21D8/12C21D1/26C23G1/08
CPCC22C38/004C22C38/04C22C38/02C22C38/002C22C38/06C22C38/001C22C38/14C21D8/1222C21D1/26C23G1/08
Inventor 程国庆裴英豪施立发何志坚占云高胡柯浦绍敏
Owner MAANSHAN IRON & STEEL CO LTD
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