Non-oriented electrical steel for ultrahigh-effect constant-frequency compressor and preparation method of non-oriented electrical steel

A technology of oriented electrical steel and compressor, which is applied in the field of non-oriented electrical steel and its preparation for ultra-high-efficiency fixed-frequency compressors, achieving the effect of good circularity and high dimensional accuracy

Inactive Publication Date: 2019-09-17
MAANSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention patent mainly studies the properties of non-oriented electrical steel with Si+Al content less than 2.0%, and there is no report on non-oriented electrical steel with Si+Al content exceeding 2.0% for fixed-frequency compressors

Method used

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  • Non-oriented electrical steel for ultrahigh-effect constant-frequency compressor and preparation method of non-oriented electrical steel

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A non-oriented electrical steel for an ultra-high-efficiency fixed-frequency compressor and a preparation method thereof, specifically comprising the following steps:

[0045] 1) The molten iron enters the converter for smelting after pretreatment, and the molten steel after smelting in the converter is refined and alloyed through the RH furnace, and the alloying elements such as Si, Al, Mn, P and other alloying elements are fine-tuned according to the composition design requirements;

[0046] 2) The molten steel refined in the RH furnace is continuously cast into a slab with a thickness of 230 mm, and electromagnetic stirring is used in the continuous casting process. The chemical composition weight percentages of the slab are Si: 1.57%; Als: 0.75%; Mn: 0.33%; P: 0.04%; C+S+N+Ti=76ppm, and the content of each element is ≤26ppm, and the rest are Fe and inevitable impurity elements;

[0047]3) The slab is heated up in a walking heating furnace to ensure that the discharg...

Embodiment 2

[0054] A non-oriented electrical steel for an ultra-high-efficiency fixed-frequency compressor and a preparation method thereof, specifically comprising the following steps:

[0055] 1) The molten iron enters the converter for smelting after pretreatment, and the molten steel after smelting in the converter is refined and alloyed through the RH furnace, and the alloying elements such as Si, Al, Mn, P and other alloying elements are fine-tuned according to the composition design requirements;

[0056] 2) The molten steel refined in the RH furnace is continuously cast into a slab with a thickness of 230 mm, and electromagnetic stirring is used in the continuous casting process. The chemical composition weight percentages of the slab are Si: 1.63%; Als: 0.68%; Mn: 0.35%; P: 0.03%; C+S+N+Ti=78ppm, and the content of each element is ≤25ppm, and the rest are Fe and inevitable impurity elements;

[0057] 3) The slab is heated up in a walking heating furnace to ensure the discharge te...

Embodiment 3

[0064] A non-oriented electrical steel for an ultra-high-efficiency fixed-frequency compressor and a preparation method thereof, specifically comprising the following steps:

[0065] 1) The molten iron enters the converter for smelting after pretreatment, and the molten steel after smelting in the converter is refined and alloyed through the RH furnace, and the alloying elements such as Si, Al, Mn, P and other alloying elements are fine-tuned according to the composition design requirements;

[0066] 2) The molten steel refined in the RH furnace is continuously cast into a slab with a thickness of 230 mm, and electromagnetic stirring is used in the continuous casting process. The chemical composition weight percentages of the slab are Si: 1.65%; Als: 0.72%; Mn: 0.41%; P: 0.03%; C+S+N+Ti=80ppm, and the content of each element is ≤25ppm, and the rest are Fe and inevitable impurity elements;

[0067] 3) The slab is heated up through a walking heating furnace to ensure that the di...

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Abstract

The invention discloses non-oriented electrical steel for an ultrahigh-effect constant-frequency compressor and a preparation method of the non-oriented electrical steel. The non-oriented electrical steel for the ultrahigh-effect constant-frequency compressor comprises the following chemical components of, in percentage by weight, 1.0%-1.90% of Si, 0.20%-0.9% of Als, 0.10%-0.60% of Mn, 0.01%-0.02% of P, less than or equal to 0.01% of C, less than or equal to 0.02% of S, less than or equal to 0.02% of N, less than or equal to 0.01% of Ti, less than or equal to 100 ppm of C+S+N+Ti, and the balance Fe and inevitable impurity elements. According to the reasonable component design, the technological technologies such as hot rolling, normalizing, cold rolling, continuous annealing and the like are matched to optimize, so that the non-oriented electrical steel for the ultrahigh-effect constant-frequency compressor is obtained, which the thickness of 0.5mm, P1.0/50 is less than or equal to 3.20W/kg, B5000 is greater than or equal to 1.72T, the yield strength Rp0.2 is less than or equal to 350 MPa, and the transverse longitudinal strength difference delta Rp0.2 is less than or equal to 10 MPa.

Description

technical field [0001] The invention belongs to the technical field of non-oriented silicon steel production, and in particular relates to a non-oriented electrical steel for ultra-high-efficiency fixed-frequency compressors and a preparation method thereof. Background technique [0002] Non-oriented electrical steel is an important iron-based soft magnetic alloy used in the manufacture of iron cores for electronic components such as motors, generators, transformers, and ballasts. Indispensable functional material. The fixed frequency refrigeration compressor is a type of compressor with constant working conditions and fixed speed. Because of its simple structure, convenient maintenance and high cost performance, it is also the main model in the current industrial refrigeration compressor. The general working efficiency is 80-85%. %between. Motor loss is mainly composed of iron loss, copper loss and mechanical loss. Non-oriented electrical steel loss is an important part o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/14C21D8/12C21D1/74C21D1/28C21D1/26
CPCC21D1/26C21D1/28C21D1/74C21D8/1222C21D8/1233C22C38/001C22C38/002C22C38/02C22C38/04C22C38/06C22C38/14
Inventor 刘青松张振海裴英豪施立发夏雪兰祁旋占云高
Owner MAANSHAN IRON & STEEL CO LTD
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