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Cold-rolled non-oriented silicon steel with excellent magnetic properties and production method thereof

A technology of grain-oriented silicon steel and production method, applied in the field of steelmaking

Active Publication Date: 2021-04-30
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Therefore, there is no report in the prior art about adopting a stable production process to prepare non-oriented silicon steel products that meet the requirements of relatively low low-field iron loss.

Method used

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  • Cold-rolled non-oriented silicon steel with excellent magnetic properties and production method thereof
  • Cold-rolled non-oriented silicon steel with excellent magnetic properties and production method thereof
  • Cold-rolled non-oriented silicon steel with excellent magnetic properties and production method thereof

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Embodiment Construction

[0062] The invention discloses a method for producing cold-rolled non-oriented silicon steel with excellent magnetic properties, wherein the chemical components contained in the cold-rolled non-oriented silicon steel in each embodiment are shown in Table 1;

[0063] Table 1 Chemical composition (%wt) of each embodiment of the present invention

[0064] Example Si mn als C S N P Ti V Nb 1 3.18 0.2 0.91 0.0036 0.0012 0.002 0.007 0.0016 0.0012 0.0014 2 3.17 0.21 0.92 0.0034 0.0008 0.0014 0.007 0.0019 0.0020 0.0015 3 3.23 0.20 0.93 0.0027 0.0011 0.0016 0.009 0.0014 0.0020 0.0016 4 3.17 0.20 0.92 0.0025 0.0015 0.0014 0.008 0.0017 0.0014 0.0015 5 3.21 0.20 0.94 0.0034 0.0005 0.0019 0.009 0.0020 0.0012 0.0020 6 3.13 0.21 0.85 0.0032 0.0014 0.0017 0.007 0.0017 0.0016 0.0018 7 3.18 0.20 0.91 0.0019 0.0008 0.002 0.008 0.0012 0.0013 0.0016 8 3.19 0.20 0.88 0.00...

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Abstract

The invention discloses a cold-rolled non-oriented silicon steel with excellent magnetic properties and a production method thereof, belonging to the technical field of steelmaking. It includes the following chemical components in mass percentage: Si: 3.10-3.50%, Als: 0.70-2.20%, Mn: 0.10-0.50%, C≤0.0040%, S≤0.0020%, N≤0.0030%, P≤0.010 %, Ti≤0.0030%, Nb≤0.0030%, V≤0.0030%, and the balance is Fe and other unavoidable impurity elements. In the preparation process, a specific pressure is also applied to the steel strip, so the iron loss value P is reduced to a certain extent 1.0 / 50 , can greatly improve the product qualification rate; calculated according to the contract of 5000 tons of 50W250 product, the original product qualification rate will increase by more than 60%.

Description

technical field [0001] The invention relates to a non-oriented silicon steel, which belongs to the technical field of steelmaking, in particular to a cold-rolled non-oriented silicon steel with excellent magnetic properties and a production method thereof. Background technique [0002] At present, the iron cores of large hydroelectric motors, the iron cores of pumped storage motors and the non-oriented silicon steel used are mainly high-grade products, especially large hydroelectric motors. Due to the special environment and bulky size of this type of motor, the working frequency is industrial frequency, and the starting torque is large, so the performance requirements for non-oriented silicon steel under low field are relatively high. If the magnetic performance is poor at low field, it will cause severe heat during long-term use, and at the same time cause motor vibration, affecting the efficiency and life of the motor, and even causing more serious consequences. However,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C21D8/12C21D1/26
CPCC21D1/26C21D8/1222C21D8/1272C22C38/001C22C38/004C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14
Inventor 万政武马文超李准马金龙杨朝龚学成丁勇黄双邓珣叶国明
Owner 武汉钢铁有限公司