Method and device for preparing high-silicon silicon steel thin strip under magnetic field through powder diffusion method

A diffusion method and powder technology, which is applied in the field of preparing high-silicon silicon steel thin strips by powder diffusion method under a magnetic field, can solve the problems of reduced elongation and increased brittleness of silicon steel, and achieve low cost, low consumption, and reduced production costs.

Pending Publication Date: 2017-10-24
GUIZHOU INST OF TECH
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Problems solved by technology

However, as the silicon content increases, the brittleness of the silicon steel strip increases significantly. When the

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  • Method and device for preparing high-silicon silicon steel thin strip under magnetic field through powder diffusion method

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Embodiment 1

[0029] Embodiment 1 of the present invention: a method for preparing high-silicon silicon steel thin strip by powder diffusion method under a magnetic field, characterized in that: the method adopts the method of arranging holes on the low-silicon steel strip to be processed, and then performing surface strengthening on the low-silicon steel strip to be processed processing, filling the holes with iron-silicon alloy powder and rolling the powder, and then heat-treating it in a magnetic field environment to obtain a high-silicon silicon steel strip with a certain orientation and a silicon content of 6.5wt% Si with excellent magnetic properties.

[0030] Wherein the surface strengthening treatment process is one of rolling, laser pulse or shot peening or a mixture of the above processes, the iron-silicon alloy powder includes powder one and powder two, calculated in parts by mass, the composition of the powder one is: pure iron powder is 5 -20 parts, 0.01-5 parts for pure silicon...

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Abstract

The invention discloses a method and a device for preparing a high-silicon silicon steel thin strip under a magnetic field through a powder diffusion method. According to the method, holes are formed in a low-silicon steel strip to be machined, then surface reinforcing treatment is carried out on the low-silicon steel strip to be machined, the holes are filled with an iron-silicon alloy powder and rolling forming is carried out on the powder, and then heat treatment is carried out on the powder in a magnetic field environment to obtain the high-silicon silicon steel thin strip with certain orientation, a silicon content of 6.5wt%Si and excellent magnetic performance. According to the method and the device, long-size and continuous operation can be realized; and moreover, a near-net-shape thin strip can be prepared, and therefore, a preparation cost can be remarkably lowered.

Description

technical field [0001] The invention relates to the technical fields of magnetic material preparation and heat treatment, in particular to a method and a device for preparing high-silicon silicon steel strips by powder diffusion under a magnetic field. Background technique [0002] High-silicon steel ribbons, especially ribbons with a silicon content of 6.5wt% Si, have excellent soft magnetic properties such as low iron loss, low magnetostriction coefficient, and high magnetic permeability. They are ideal soft magnetic materials for high-frequency motors. Widely used in national defense, electric power, electronics, electrical appliances and other fields. However, as the silicon content increases, the brittleness of the silicon steel strip increases significantly. When the silicon content exceeds 5wt%, the elongation of the silicon steel is almost reduced to zero. Silicon silicon steel thin strip. [0003] Scholars at home and abroad have done a lot of research on the prep...

Claims

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Application Information

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IPC IPC(8): B22F3/18B22F3/24B23P15/00
CPCB22F3/18B22F3/24B23P15/00B22F2999/00B22F2003/248B22F2202/05
Inventor 龙琼杨婷彭南丹孙启辉余正平曾英路坊海罗勋
Owner GUIZHOU INST OF TECH
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