Low-carbon ferrite soft magnetic stainless steel and production method thereof

A technology of soft magnetic stainless steel and a production method, which is applied in the field of iron and steel smelting to achieve the effects of improving weldability and soft magnetic properties, expanding the scope of use, and increasing the content of Si element

Inactive Publication Date: 2017-08-04
XINGTAI IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no research on a low-carbon ferritic

Method used

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  • Low-carbon ferrite soft magnetic stainless steel and production method thereof
  • Low-carbon ferrite soft magnetic stainless steel and production method thereof
  • Low-carbon ferrite soft magnetic stainless steel and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The chemical composition and production method of low carbon ferritic soft magnetic stainless steel are as follows:

[0022] Chemical composition and mass percentage of low carbon ferritic soft magnetic stainless steel: C: 0.02%, Si: 2.7%, Mn: 0.35%, P: 0.018%, S: 0.01%, Cr: 13.9%, Ni: 0.2% , Mo: 0.25%, V: 0.08%, Ti: 0.10%, N: 0.019%, and the balance is Fe and unavoidable impurity elements.

[0023] The production method of low-carbon ferritic soft magnetic stainless steel includes dephosphorization of molten iron, smelting in AOD furnace, refining in LF furnace, continuous casting, rolling, annealing, and pickling. The specific steps are as follows:

[0024] 1) Hot metal dephosphorization process: hot metal dephosphorization treatment, the main chemical components and mass percentages of the dephosphorized hot metal are: C: 3.2%, Si: 0.015%, P: 0.015%, and the temperature of the hot metal is 1260°C.

[0025] 2) AOD furnace smelting process:

[0026] The dephosphorize...

Embodiment 2

[0035] The chemical composition and production method of low carbon ferritic soft magnetic stainless steel are as follows:

[0036] Chemical composition and mass percentage of low carbon ferritic soft magnetic stainless steel: C: 0.02%, Si: 2.85%, Mn: 0.27%, P: 0.016%, S: 0.01%, Cr: 14.00%, Ni: 0.24% , Mo: 0.24%, V: 0.15%, Ti: 0.04%, N: 0.015%, and the balance is Fe and unavoidable impurity elements.

[0037] The production method of low-carbon ferritic soft magnetic stainless steel includes dephosphorization of molten iron, smelting in AOD furnace, refining in LF furnace, continuous casting, rolling, annealing, and pickling. The specific steps are as follows:

[0038] 1) Hot metal dephosphorization process: hot metal dephosphorization treatment, the main chemical components and mass percentages of the dephosphorized hot metal are: C: 3.1%, Si: 0.018%, P: 0.015%, and the temperature of the hot metal is 1265°C.

[0039] 2) AOD furnace smelting process:

[0040] The dephosphoriz...

Embodiment 3

[0049] The chemical composition and production method of low carbon ferritic soft magnetic stainless steel are as follows:

[0050] Chemical composition and mass percentage of low carbon ferritic soft magnetic stainless steel: C: 0.030%, Si: 2.50%, Mn: 0.50%, P: 0.014%, S: 0.01%, Cr: 13.50%, Ni: 0.23% , Mo: 0.24%, V: 0.08%, Ti: 0.06%, N: 0.17%, the balance is Fe and unavoidable impurity elements

[0051] The production method of low-carbon ferritic soft magnetic stainless steel includes dephosphorization of molten iron, smelting in AOD furnace, refining in LF furnace, continuous casting, rolling, annealing, and pickling. The specific steps are as follows:

[0052] 1) Hot metal dephosphorization process: hot metal dephosphorization treatment, the main chemical components and mass percentages of the dephosphorized hot metal are: C: 3.3%, Si: 0.017%, P: 0.012%, and the temperature of the hot metal is 1255°C.

[0053] 2) AOD furnace smelting process:

[0054] The dephosphorized ...

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Abstract

The invention relates to low-carbon ferrite soft magnetic stainless steel and a production method thereof. The steel is prepared from, by mass, smaller than or equal to 0.03% of C, 2.5%-3.5% of Si, smaller than or equal to 0.5% of Mn, smaller than 0.03% of P, smaller than 0.03% of S, 13.5%-15.0% of Cr, smaller than or equal to 0.6% of Ni, 0.2%-0.7% of Mo, smaller than or equal to 0.15% of V, smaller than or equal to 0.1% of Ti, smaller than 0.020% of N and the balance Fe and unavoidable impurity elements. The production method comprises the steps of molten iron dephosphorization, AOD furnace smelting, LF furnace refining and continuous casting. The stainless steel has good corrosion resisting performance, the using category of soft magnetic products is greatly widened, and pollution, caused by frequent processing, to the environment is reduced. In the ferrite stainless steel, the C content is further decreased, the content of Si element is increased, the welding performance and soft magnetic performance of materials are improved, and the low-carbon ferrite soft magnetic stainless steel is used for making vehicle ABS controls and solenoid valve components in household appliances.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting, and in particular relates to a low-carbon ferritic soft magnetic stainless steel and a production method thereof. Background technique [0002] Commonly used magnetic materials such as pure iron or silicon steel need to be electroplated to improve their corrosion resistance after they are processed into components, which not only increases the cost but also pollutes the environment. The research of magnetic stainless steel is very necessary. [0003] Patent Application No. CN200910116915.8—Preparation process of 00Cr13Si2MoAl soft magnetic chromium stainless alloy material for welding, this process adds a certain amount of Si, Al and other elements, does not contain lead, sulfide type and alumina type non-metallic inclusion content It is required to be below level 1, and the production process is a triple smelting process of "intermediate frequency furnace-AOD furnace refining-el...

Claims

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Application Information

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IPC IPC(8): C22C38/34C22C38/04C22C38/44C22C38/46C22C38/50C22C38/22C22C38/24C22C38/28C22C33/04C21C7/00C21D1/26B22D11/22
CPCB22D11/225C21C7/0006C21D1/26C22C33/04C22C38/001C22C38/004C22C38/04C22C38/22C22C38/24C22C38/28C22C38/34C22C38/44C22C38/46C22C38/50
Inventor 张孟昀宋云霞郭键白李国姜方王利伟张荣兴曹洪波王笑丹冯文甫郭志斌姚万利马祥锋李广斌
Owner XINGTAI IRON & STEEL
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