Method and device for preparing high-silicon silicon steel sheet in static magnetic field with powder sintering method

A technology of high-silicon steel sheet and sintering method, which is applied in the direction of magnetic materials, magnetic objects, inorganic materials, etc., to achieve high orientation and anisotropy, good magnetic properties, and ensure the effect of purity

Active Publication Date: 2012-09-12
SHANGHAI UNIV
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Problems solved by technology

If the high-silicon silicon steel sheet can have a certain degree of orientation through a certain process, the magnetic properties of th...

Method used

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  • Method and device for preparing high-silicon silicon steel sheet in static magnetic field with powder sintering method
  • Method and device for preparing high-silicon silicon steel sheet in static magnetic field with powder sintering method
  • Method and device for preparing high-silicon silicon steel sheet in static magnetic field with powder sintering method

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Embodiment 1

[0023] The following are specific embodiments of the present invention.

[0024] A preferred embodiment of the present invention is: see appended figure 1 .

[0025] Weigh 18700g of micron-sized iron powder and 1300g of nano-sized pure silicon powder according to the ratio of silicon weight content of 6.5%, and put them into a V-shaped mixer for mixing. The mixing speed is 70r / min, and the mixing time is 10h. , During the mixing process, argon protection is passed through the mixer. After the mixing is completed, take out the uniformly mixed Fe-Si powder, and press-roll it into multiple pieces of Fe-6.5wt%Si powder slabs with a size of 80mm×80mm×50mm.

[0026] In the method for preparing 6.5% high-silicon silicon steel sheet by powder sintering under a constant magnetic field, the sintering process is realized by an atmosphere / vacuum protection high-temperature sintering device under a constant magnetic field. see figure 1 . The atmosphere / vacuum sintering device under ...

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Abstract

The invention relates to a method and device for preparing a silicon steel sheet in a static magnetic field with a powder sintering method. The specific process of the method consists of the following steps of: mixing Fe-Si powder; rolling into a plate blank; and sintering a Fe-6.5 weight percent Si green compact in a static magnetic field. In the method, 6.5 percent by weight of Si high-silicon steel with high density is obtained by using the influence of the magnetic field on the sintering densification and orientation process of a Fe-6.5 weight percent Si powder green compact, and an easily-magnetized axis is oriented along the magnetic field. An atmosphere/vacuum sintering device in a static magnetic field consists of a temperature control device, an exhaust pipe, a thermocouple, a heating element, a corundum crucible, a refractory fiber, a support block, a heat insulating block, a water-cooled bush, a static magnetic field generating device, a sealed corundum pipe, an inert gas inlet valve, a vacuum pumping valve, a Fe-6.5weight percent Si green compact, a thin corundum plate interlayer and a fixing molybdenum wire. The 6.5 percent Si silicon steel sheet prepared with the method has the advantages of near net molding, superior magnetic property, high orientation degree and the like, and has a remarkable industrial application prospect.

Description

technical field [0001] The invention relates to a method and a device for preparing a high-silicon silicon steel sheet by a powder sintering method under a constant magnetic field, and belongs to the technical field of silicon steel preparation technology. Background technique [0002] Silicon steel is an important magnetic material used in the electric power and telecommunications industry to manufacture generators, motors, transformers, transformers, relays and other electrical instruments 、 , the high-silicon steel with a silicon content of 6.5% has a magnetostriction coefficient tending to zero, a maximum magnetic permeability, a large resistivity, and a small turbine loss. It is an ideal iron core material with low noise and low iron loss. However, due to the increase of silicon content, the brittleness of silicon steel sheet increases, and the traditional rolling method is difficult to process. Therefore, the silicon content of silicon steel sheet produced in large qua...

Claims

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Application Information

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IPC IPC(8): B22F3/16H01F1/047H01F1/08
Inventor 钟云波汤聂韦饶显君任维丽雷作胜
Owner SHANGHAI UNIV
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