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Mother alloy for iron-based nanocrystalline alloy, smelting technology for mother alloy and cast steel groove used in smelting technology

An iron-based nanocrystal and master alloy technology is applied in the field of casting steel troughs and master alloys for iron-based nanocrystal alloys. Superior magnetic properties, improved composition uniformity, and high saturation magnetic flux density

Active Publication Date: 2017-11-24
中能建华南电力装备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] (1) The order of feeding is unreasonable, which leads to excessive oxidation of many alloy elements, and at the same time, it is easy to form steel slag in molten steel, and the melting temperature of Si is low, and the melting temperature of Nb is high. In the case of low temperature, Si is easy to coat on Nb. Coarse particles are formed in molten steel, so that the overall composition of molten steel is uneven;
[0008] ⑵In the first step of the initial feeding sequence, it takes a long time to smelt ferroniobium at low temperature, and it takes 4 to 5 hours to completely melt. large, making the overall cost higher
[0009] (3) After pouring steel in the existing intermediate frequency furnace smelting process, the molten steel is air-cooled, resulting in coarse grains and uneven composition of the cooled steel ingot

Method used

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  • Mother alloy for iron-based nanocrystalline alloy, smelting technology for mother alloy and cast steel groove used in smelting technology
  • Mother alloy for iron-based nanocrystalline alloy, smelting technology for mother alloy and cast steel groove used in smelting technology
  • Mother alloy for iron-based nanocrystalline alloy, smelting technology for mother alloy and cast steel groove used in smelting technology

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Embodiment 1

[0052] The present invention is a master alloy for iron-based nanocrystalline alloy. The weight percentage of each component of the master alloy is: Si: 8.8%, B: 1.5%, Cu: 1.2%, Nb: 5.5%, P: 0.02%, S : 0.01%, C: 0.03%, Cr: 0.05%, Mn: 0.03%, Ti: 0.02%, and the balance is Fe and impurities.

[0053] The smelting process of the master alloy for the above-mentioned iron-based nanocrystalline alloy comprises the following steps:

[0054] (1) Place half of the total amount of pure iron evenly and vertically along the inner wall circumference of the intermediate frequency furnace;

[0055] (2) Adjust the current of the intermediate frequency furnace to 120A, after heating for 15 minutes, then adjust the current to 200A, heat for half an hour, then adjust to 300A, and add half of the total amount of silicon after the pure iron is burned red;

[0056] (3) After the pure iron and silicon are completely melted, pay attention to the surface of the molten steel at any time during this pro...

Embodiment 2

[0072] The iron-based nanocrystalline alloy master alloy of this embodiment, the percentage by weight of each component of the master alloy is: Si: 9.2%, B: 1.7%, Cu: 1.3%, Nb: 5.8%, P: 0.01%, S : 0.01%, C: 0.02%, Cr: 0.05%, Mn: 0.03%, Ti: 0.01%, and the balance is Fe and impurities.

[0073] The smelting process of the master alloy for the above-mentioned iron-based nanocrystalline alloy comprises the following steps:

[0074] (1) Place half of the total amount of pure iron evenly and vertically along the inner circumference of the furnace body of the intermediate frequency furnace;

[0075] (2) First adjust the current of the intermediate frequency furnace to 110A, heat for 10 minutes, then adjust the current to 190A, heat for 25 minutes, then adjust to 300A, and add half of the total amount of silicon after the pure iron is burned red;

[0076] (3) After the pure iron and silicon are completely melted, pay attention to the surface of the molten steel at any time during thi...

Embodiment 3

[0084] The master alloy for the iron-based nanocrystalline alloy of this embodiment, the percentage by weight of each component of the master alloy is: Si: 9.0%, B: 1.6%, Cu: 1.2%, Nb: 5.7%, P: 0.02%, S : 0.01%, C: 0.04%, Cr: 0.05%, Mn: 0.03%, Ti: 0.02%, and the balance is Fe and impurities.

[0085] The smelting process of the master alloy for the above-mentioned iron-based nanocrystalline alloy comprises the following steps:

[0086] (1) Place half of the total amount of pure iron evenly and vertically along the inner circumference of the furnace body of the intermediate frequency furnace;

[0087](2) First adjust the current of the intermediate frequency furnace to 130A, heat for 20 minutes, then adjust the current to 210A, heat for 35 minutes, and then adjust to 300A, and add half of the total amount of silicon after the pure iron is burned red;

[0088] (3) After the pure iron and silicon are completely melted, pay attention to the surface of the molten steel at any time...

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Abstract

The invention discloses a mother alloy for an iron-based nanocrystalline alloy. The mother alloy is composed of, by weight percentage, 8.8-9.2% of Si, 1.5-1.7% of B, 1.2-1.3% of Cu, 5.5-5.8% of Nb, less than 0.03% of P, less than 0.02% of S, less than 0.05% of C, less than 0.07% of Cr, less than 0.05% of Mn, less than 0.03% of Ti and the balance Fe and impurities. The invention further relates to a smelting method for the mother alloy for the iron-based nanocrystalline alloy and a cast steel groove used in the smelting method. The mother alloy for the iron-based nanocrystalline alloy is uniform in composition and low in manufacturing cost; and qualified iron-based nanocrystalline alloy strips can be produced by taking the mother alloy as raw materials, the strips have the characteristics of high saturation magnetic induction intensity, high magnetic conductivity, low loss and the like, the comprehensive soft magnetic performance is very excellent, the energy-saving and environment-friendly requirements of the development in the new century can be met, and the mother alloy is an environment-friendly and energy-saving material.

Description

technical field [0001] The invention relates to iron-based nanocrystalline alloy technology, in particular to a master alloy for iron-based nanocrystalline alloys, a smelting process of the master alloy, and a pouring tank used in the smelting process. Background technique [0002] Iron-based nanocrystalline alloys are widely used due to their excellent soft magnetic properties. They can be made into magnetic cores for anti-electromagnetic interference filters, high-frequency transformers, power transformers, transformers, sensors, high-frequency switching power supplies, and program-controlled switching power supplies. Wait. [0003] The iron-based nanocrystalline alloy is obtained through proper annealing treatment on the basis of the iron-based amorphous alloy. The purpose of the annealing treatment is to precipitate some α-Fe nanocrystalline grains with a bcc structure on the amorphous alloy matrix, thereby further improving Soft magnetic and mechanical properties of ma...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/32C22C38/16C22C38/12C22C38/14C22C38/04C22C38/34C22C38/20C22C38/26C22C38/28C22C33/06B22D27/04B22D35/04B22D35/06
Inventor 郑育森夏崧崧韦艳妮杨琴
Owner 中能建华南电力装备有限公司
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