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A kind of non-oriented silicon steel for driving motor and its production method

A technology of oriented silicon steel and drive motor, which is applied in the direction of improving process efficiency, can solve the problems of high cost and complicated process, and achieve the effects of low production cost, simple process and short production cycle

Active Publication Date: 2021-05-28
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Produced by secondary cold rolling method, the process is more complicated and the cost is high

Method used

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  • A kind of non-oriented silicon steel for driving motor and its production method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] According to the chemical composition shown in Table 1, it is smelted, billet cast, and hot rolled. Adjust normalization, cold rolling, and annealing processes to achieve stable and smooth production.

[0044]Normalization: the temperature rise rate of the steel strip is 315°C / min, the normalization holding time is 1.5min, the grain size after normalization is 118.3μm, and the soaking section temperature is 945°C.

[0045] Cold rolling: the reduction rate of the first pass is 38%, the rolling force is 458t, and the unit tension of the entry side of the second pass is 28Kg / mm 2 , the outlet side unit tension is 30Kg / mm 2 .

[0046] Annealing: the speed is 80m / min, and the temperature is 925°C.

[0047] According to the chemical composition design in Table 1, and adopting the above control process, the mechanical properties of the 0.27-0.35mm cold-rolled non-oriented silicon steel products for driving motors produced are shown in Table 2.

Embodiment 2

[0049] According to the chemical composition shown in Table 1, it is smelted, billet cast, and hot rolled. Adjust normalization, cold rolling, and annealing processes to achieve stable and smooth production.

[0050] Normalization: The temperature rise rate of the steel strip is 320°C / min, the normalization holding time is 1.2min, the grain size after normalization is 127.5μm, and the soaking section temperature is 965°C.

[0051] Cold rolling: the reduction rate of the first pass is 36%, the rolling force is 425t, and the unit tension of the entry side of the second pass is 29Kg / mm 2 , the unit tension on the outlet side is 33Kg / mm 2 .

[0052] Annealing: the speed is 70m / min, and the temperature is 905°C.

[0053] According to the chemical composition design in Table 1, and adopting the above control process, the mechanical properties of the 0.27-0.35mm cold-rolled non-oriented silicon steel products for driving motors produced are shown in Table 2.

Embodiment 3

[0055] According to the chemical composition shown in Table 1, it is smelted, billet cast, and hot rolled. Adjust normalization, cold rolling, and annealing processes to achieve stable and smooth production.

[0056] Normalization: the temperature rise rate of the steel strip is 330°C / min, the normalization holding time is 1.4min, the grain size after normalization is 135.4μm, and the soaking section temperature is 959°C.

[0057] Cold rolling: the reduction rate of the first pass is 40%, the rolling force is 489t, and the unit tension of the entry side of the second pass is 26Kg / mm 2 , the unit tension on the outlet side is 31Kg / mm 2 .

[0058] Annealing: the speed is 75m / min, and the temperature is 910°C.

[0059] According to the chemical composition design in Table 1, and adopting the above control process, the mechanical properties of the 0.27-0.35mm cold-rolled non-oriented silicon steel products for driving motors produced are shown in Table 2.

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Abstract

The invention relates to the field of manufacturing non-oriented silicon steel, in particular to a production method of a cold-rolled non-oriented silicon steel product for driving motors of new energy vehicles. Its chemical composition is wt%: C≤0.0030, Si: 3.0~3.3, Mn: 0.5~1.0, P: 0.005~0.010, S: 0.0016~0.0025, N≤0.0035, Als: 1.0~1.5, Cu: 0.30~0.50 , Nb: 0.0020 ~ 0.0040, the rest are Fe and unavoidable residual elements. Among them, control [Si]+[Al]+[Mn]: 4.5~5.5, [Cu] / [S]: 120~320. The present invention adopts reasonable chemical composition design and adopts the above-mentioned control process to obtain a non-orientation drive motor with excellent electromagnetic properties, good mechanical properties, simple preparation process, short production cycle, and low production cost. Silicon steel.

Description

technical field [0001] The invention relates to the field of manufacturing non-oriented silicon steel, in particular to a production method of a cold-rolled non-oriented silicon steel product for driving motors of new energy vehicles. Background technique [0002] The drive motor is one of the most core assemblies in new energy vehicles. A high-efficiency drive motor is a prerequisite for the production of new energy vehicles with excellent performance, and cold-rolled non-oriented silicon steel is the preferred material for the production of drive motor cores. The most important part, which will be subjected to various stresses when it is working inside the drive motor, requires high tensile strength and yield strength. [0003] At the same time, non-oriented silicon steel for driving motors requires excellent electromagnetic properties, that is, high magnetic induction under medium and low magnetic fields and low iron loss at high frequencies, so the content of the main al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/16C22C38/12C22C38/06C22C38/04C22C38/02C21D1/26C21D8/12
CPCC21D1/26C21D8/1222C21D8/1233C21D8/1244C22C38/001C22C38/002C22C38/004C22C38/02C22C38/04C22C38/06C22C38/12C22C38/16Y02P10/20
Inventor 陈春梅高振宇李亚东刘文鹏张智义赵健宋清阳张仁波李文权王洪涛
Owner ANGANG STEEL CO LTD
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