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A kind of easy-punching electrical steel for high-efficiency fixed-frequency compressor and its manufacturing method, as well as its prepared iron core and heat treatment method of iron core

A compressor and electrical steel technology, applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., to achieve the effect of improving the blanking process tolerance rate, blanking tolerance rate, and mechanical properties.

Active Publication Date: 2021-12-24
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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  • A kind of easy-punching electrical steel for high-efficiency fixed-frequency compressor and its manufacturing method, as well as its prepared iron core and heat treatment method of iron core

Examples

Experimental program
Comparison scheme
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-punching electrical steel for a high-efficiency fixed-frequency compressor, a manufacturing method thereof, and an iron core and a heat treatment method for the iron core. The easy-punching electrical steel for a high-efficiency fixed-frequency compressor includes the following weights Percent chemical composition: Si: 1.70% ~ 2.30%; Als: 0.10% ~ 0.60%; Mn: 0.20% ~ 0.60%; P: 0.02% ~ 0.10%; C: ≤0.005%; S: ≤0.01%; N : ≤0.01%; Ti: ≤0.005%; and C+S+N+Ti: ≤100ppm; the remainder is iron and inevitable impurities; With the optimization of the chemical and continuous annealing process, the blanking error tolerance rate of the finished silicon steel plate has been significantly improved. The same set of molds has punched more than 3.2 million times in a single cycle. % performance requirements.

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 Patents(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