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Non-oriented electrical steel for inverter compressor and production method thereof

A technology of grain-oriented electrical steel and frequency conversion compressor, which is applied to the non-oriented electrical steel for frequency conversion compressor and its production field, can solve the problems of high iron loss, difficulty in meeting the requirements of frequency conversion compressor, etc., and achieve the effect of good mechanical performance

Inactive Publication Date: 2013-12-11
武汉钢铁有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The iron loss of this patent is too high, it is difficult to meet the requirements of the inverter compressor

Method used

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  • Non-oriented electrical steel for inverter compressor and production method thereof
  • Non-oriented electrical steel for inverter compressor and production method thereof
  • Non-oriented electrical steel for inverter compressor and production method thereof

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Embodiment Construction

[0029] The present invention is described in detail below:

[0030] Table 1 is the value list of each embodiment of the present invention and comparative example;

[0031] Table 2 is the main process parameter list of each embodiment of the present invention and comparative example;

[0032] Table 3 is a list of the performance tests of the various embodiments of the present invention and comparative examples.

[0033] Each embodiment of the present invention is produced according to the following steps:

[0034] 1) The smelting process of clean steel is used for smelting and continuous casting into billets;

[0035] 2) Heat the continuous casting billet to 950~1200℃, and control its time in the furnace: 1.5~3h;

[0036] 3) Carry out rough rolling, control the outlet temperature to 900-1050°C, and control the cumulative reduction rate to 90-95%;

[0037] 4) Carry out finish rolling, control the cumulative reduction rate of the first 4 passes to 85-95%, and control the outl...

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Abstract

The invention discloses non-oriented electrical steel for an inverter compressor, which comprises the following chemical components in percentage by weight: 0.001-0.015% of C, 2.0-2.5% of Si, 0.15-0.55% of Al, 0.15-0.55% of Mn, 0.01-0.039% of Cr, less than or equal to 0.12% of Sn, less than or equal to 0.08% of P, less than or equal to 0.015% of S and less than or equal to 0.008% of N. A production technology comprises the following steps: smelting by a clean steel technology, and performing continuous casting to obtain a blank; heating the continuous-cast blank; performing rough rolling, finish rolling, reeling, normalizing, acid pickling, cold rolling, decarbonization and soaking; and cooling, coating and finishing according to a conventional way. According to the non-oriented electrical steel and production technology disclosed by the invention, on the premise of guaranteeing the magnetic performance (P1.5 / 50 is less than or equal to 2.65w / kg, B50 is greater than or equal to 1.68T), relatively good mechanical performance is also realized, namely that the ratio of elongation to yield ratio is 0.37-0.43; and meanwhile, the requirements for high-speed stamping and magnetic performance in manufacturing of an iron core of an inverter compressor are met.

Description

technical field [0001] The invention relates to a non-oriented electrical steel and a production method thereof, in particular to a non-oriented electrical steel for an inverter compressor and a production method thereof. Background technique [0002] With the rapid development of variable frequency compressor technology, some special requirements are put forward for its iron core material: not only must it have good electromagnetic properties, but also must have machining properties suitable for high-speed punching machines. However, the non-oriented electrical steel currently used in inverter compressors is difficult to achieve both. Either the magnetic properties are very good, but the processing performance is poor; or the processing performance is very good, and the electromagnetic properties are poor. [0003] Inverter compressors require non-oriented electrical steel to have: 1. Low iron loss to ensure that the temperature does not exceed the specified value during h...

Claims

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Application Information

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IPC IPC(8): C22C38/34
Inventor 冯大军万政武祝晓波骆忠汉曹阳杜光梁叶九美毛炯辉石文敏
Owner 武汉钢铁有限公司
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