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Preparation method of silicon steel thin strip

A thin strip and silicon steel technology, which is applied in the field of silicon steel thin strip preparation, can solve problems affecting steel quality and high resource consumption, and achieve the effects of shortening the smelting process, improving production efficiency, and saving energy consumption and investment

Active Publication Date: 2020-05-05
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above analysis, the embodiment of the present invention aims to provide a method for preparing a silicon steel strip to solve the technical problems of high resource consumption and residual oxygen and inclusions affecting the quality of steel in the existing silicon steel strip preparation process

Method used

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  • Preparation method of silicon steel thin strip
  • Preparation method of silicon steel thin strip

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Experimental program
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Effect test

Embodiment 1

[0033] The application discloses a method for preparing a thin silicon steel strip, such as figure 1 shown, including the following steps:

[0034] Step 1. Using a high-vacuum single-roller rotary quenching arc melting system to prepare silicon-containing silicon-iron-carbon alloy thin strips

[0035] Step 1.1, after weighing high-purity iron powder, graphite powder and silicon powder, mix and stir according to a certain ratio to obtain mixed raw materials;

[0036] Step 1.2, put the mixed raw material prepared in step 1.1 into the first quartz test tube, then put the first quartz test tube into the corundum crucible, and use a horizontal heating furnace to carry out program temperature control heating, the heating time is 25 ~ 35min, the heating temperature It is 1780~1800K, and the block master alloy is obtained;

[0037] Step 1.3, put the bulk master alloy prepared in step 1.2 into a second quartz test tube of moderate length, set the second quartz test tube with an eject...

Embodiment 2

[0058] The preparation method of present embodiment prepares silicon steel comprises the following steps:

[0059] Step 1, using a high-vacuum single-roller rotary quenching arc melting system to prepare silicon-iron-carbon alloy thin strips, including the following steps:

[0060] Step 1.1. Weigh out 9.5g of high-purity iron powder, 0.4g of graphite powder and 0.1g of silicon powder with a JJ623BC electronic balance, mix and stir evenly to obtain mixed raw materials;

[0061] Step 1.2, put the mixed raw materials into the first quartz test tube, heat the mixed raw materials to 1780-1800K in a horizontal heating furnace, and the heating time is 25-35 minutes to obtain a block master alloy;

[0062] Step 1.3. Put the blocky master alloy into the second quartz test tube which has an ejection hole and is fixed under the spray casting gun, so that the block master alloy in the test tube is just placed in the heating area of ​​the induction coil, and the copper mold is cooled Plac...

Embodiment 3

[0070] The preparation method that present embodiment prepares silicon steel comprises the following steps: as figure 2 as shown,

[0071] Step 1: preparing silicon-iron-carbon alloy thin strips;

[0072] In order to reduce the content of sulfur element in silicon steel to 0.006%, a pretreatment process of molten iron is required. The pretreatment adopts the method of single-blowing granular magnesium for desulfurization. After adding the slag accumulator to the molten iron and removing the slag once, spray powder for desulfurization, and then add the slag accumulator after standing still for 3 minutes, and then spray powder and remove slag again. The composition of molten iron after pretreatment is C=0.5%, Si=2.5%, S=0.006%, Als=0.025%, N=0.008%, P<0.005%, O<0.003%.

[0073] The molten iron obtained in step 1 is made into a thin slab through strip continuous casting, that is, the molten iron obtained after the pretreatment of molten iron in step 1 flows into the tundish pr...

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Abstract

The invention relates to a preparation method of a silicon steel thin strip, belongs to the technical field of metal material smelting, and solves the problems of large resource consumption and influence of residual oxygen and inclusions on steel quality in an existing silicon steel thin strip preparation process. The preparation method of the silicon steel thin strip comprises the following steps: step 1, preparing a silicon-iron-carbon alloy thin strip; step 2, decarbonizing the silicon-iron-carbon alloy thin strip to obtain a silicon steel thin strip; and 3, detecting the carbon element distribution, the microstructure, the phase, the average carbon content and the magnetic property of the thin strip. According to the preparation method of the silicon steel thin strip, processes such asconverter smelting are omitted, and the preparation method has important significance for saving energy consumption investment, shortening the smelting process, reducing the production and protectingthe environment.

Description

technical field [0001] The invention relates to the technical field of metal material smelting, in particular to a method for preparing a thin silicon steel strip. Background technique [0002] Silicon steel, also known as "electrical steel", is a silicon-iron soft magnetic alloy with extremely low carbon content (about <0.02wt%), and the Si content is generally 1.5wt%-4.5wt%. Silicon steel accounts for more than 90% of the total magnetic materials, and is the most widely used soft magnetic alloy, mainly used in military industry and electronic power industry. Its production technology is complicated and its manufacturing technology is strict, so it is called "handicraft among steel products." [0003] Decarburization has a great influence on the final product performance of silicon steel. The less residual carbon content in the steel, the less possibility of magnetic failure and reduced magnetic performance during its service. The traditional silicon steel smelting pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/06C21D3/04C22C38/02C22C33/06C22C38/06
CPCB22D11/0611C21D3/04C22C33/06C22C38/001C22C38/002C22C38/02C22C38/06
Inventor 艾立群洪陆阔孙彩娇候耀斌周美洁周玉青孟凡峻
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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