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Easy-to-cut electrical steel for efficient invariable frequency compressor, manufacture method of easy-to-cut electrical steel, iron core made of easy-to-cut electrical steel and thermal treatment method of iron core

A manufacturing method and compressor technology, applied to heat treatment furnaces, heat treatment equipment, electromechanical devices, etc., to achieve the effects of improving mechanical properties, increasing replacement cycles, and increasing the fault tolerance rate of blanking processes

Active Publication Date: 2020-06-05
MAANSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no report on the non-oriented electrical steel for high-efficiency fixed-frequency compressors with a Si content of about 2.0% and the matching of the mechanical properties of the electrical steel with the blanking process

Method used

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  • Easy-to-cut electrical steel for efficient invariable frequency compressor, manufacture method of easy-to-cut electrical steel, iron core made of easy-to-cut electrical steel and thermal treatment method of iron core

Examples

Experimental program
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Effect test

Embodiment 1

[0035] An easy-punching non-oriented electrical steel for high-efficiency fixed-frequency compressors and a manufacturing method thereof, specifically comprising the following steps:

[0036] 1) The molten iron is pretreated and enters the converter for smelting, and the molten steel after converter smelting is refined and alloyed through the RH furnace, and the alloying elements such as Si, Al, Mn, P are fine-tuned according to the composition design requirements;

[0037] 2) The molten steel refined in the RH furnace is continuously cast into a slab with a thickness of 230mm. The continuous casting process uses electromagnetic stirring, and the chemical composition weight percentages of the slab are Si: 1.98%; Als: 0.31%; Mn: 0.30%; P: 0.04%; C+S+N+Ti: 72ppm, and the content of each element is ≤25ppm, and the rest is Fe and unavoidable impurity elements;

[0038] 3) Raise the temperature of the slab through a walking heating furnace to ensure that the furnace temperature is ...

Embodiment 2

[0046] An easy-punching non-oriented electrical steel for high-efficiency fixed-frequency compressors and a manufacturing method thereof, specifically comprising the following steps:

[0047] 1) The molten iron is pretreated and enters the converter for smelting, and the molten steel after converter smelting is refined and alloyed through the RH furnace, and the alloying elements such as Si, Al, Mn, P are fine-tuned according to the composition design requirements;

[0048] 2) The molten steel refined in the RH furnace is continuously cast into a slab with a thickness of 230mm. The continuous casting process uses electromagnetic stirring, and the chemical composition weight percentages of the slab are Si: 2.04%; Als: 0.34%; Mn: 0.28%; P: 0.03%; C+S+N+Ti: 84ppm, and the content of each element is ≤25ppm, and the rest is Fe and unavoidable impurity elements;

[0049] 3) Raise the temperature of the slab through a walking heating furnace to ensure that the furnace temperature is ...

Embodiment 3

[0057] An easy-punching non-oriented electrical steel for high-efficiency fixed-frequency compressors and a manufacturing method thereof, specifically comprising the following steps:

[0058] 1) The molten iron is pretreated and enters the converter for smelting, and the molten steel after converter smelting is refined and alloyed through the RH furnace, and the alloying elements such as Si, Al, Mn, P are fine-tuned according to the composition design requirements;

[0059] 2) The molten steel refined in the RH furnace is continuously cast into a slab with a thickness of 230mm. The continuous casting process uses electromagnetic stirring, and the chemical composition weight percentages of the slab are Si: 1.95%; Als: 0.37%; Mn: 0.34%; P: 0.02%; C+S+N+Ti: 85ppm, and the content of each element is ≤25ppm, and the rest is Fe and unavoidable impurity elements;

[0060] 3) Raise the temperature of the slab through a walking heating furnace to ensure that the furnace temperature is ...

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Abstract

The invention discloses an easy-to-cut electrical steel for an efficient invariable frequency compressor, a manufacture method of the easy-to-cut electrical steel, an iron core made of the easy-to-cutelectrical steel and a thermal treatment method of the iron core. The easy-to-cut electrical steel for the efficient invariable frequency compressor is prepared from, by weight, 1.70-2.30% of Si, 0.10-0.60% of Als, 0.20-0.60% of Mn, 0.02-0.10% of P, smaller than or equal to 0.005% of C, smaller than or equal to 0.01% of S, smaller than or equal to 0.01% of N, smaller than or equal to 0.005% of Tiand the balance iron and unavoidable impurities, wherein the content of C, S, N and Ti is smaller than or equal to 100 ppm. By adjusting the proportion of the three alloy elements, namely Si, Mn andAls and optimizing the hot rolling, normalizing and continuous annealing processes, the error-tolerant rate of cutting a finished product silicon steel plate is obviously increased, the same set of mold is cut by 3,200 thousand times or above in a single circle, and after being annealed, the iron core processed by using the electrical steel can meet the performance demand of 85% of the efficiencyof the compressor.

Description

technical field [0001] The invention belongs to the technical field of non-oriented silicon steel production, and in particular relates to an easy-punching electrical steel for high-efficiency fixed-frequency compressors, a manufacturing method thereof, an iron core prepared by the same and a heat treatment method for the iron core. Background technique [0002] Fixed frequency compressor is a type of compressor with constant working frequency and fixed speed. Due to its simple structure, low maintenance cost and high cost performance, it is widely used in refrigeration appliances such as household air conditioners and refrigerators, and is also an industrial refrigeration compressor. main models. The core material of high-efficiency fixed-frequency compressors is generally made of non-oriented cold-rolled electrical steel with a Si content of about 2.0%, and the working efficiency of the assembled compressor is about 85%. During the blanking process of non-oriented electri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/04C21D1/28C21D1/74C21D6/00C21D8/12C21D9/00C22C38/02C22C38/04C22C38/06C22C38/14H02K15/02H02K15/12
CPCC22C33/04C21D1/28C21D1/74C21D8/1216C21D9/0081C21D6/005C21D6/008C22C38/004C22C38/02C22C38/06C22C38/04C22C38/002C22C38/001C22C38/14C21D9/0068H02K15/02H02K15/12
Inventor 刘青松裴英豪施立发夏雪兰杜军祁旋徐文祥
Owner MAANSHAN IRON & STEEL CO LTD