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Method and device for continuously preparing high-silicon silicon steel thin strip through current composite diffusion method

A technology of high silicon steel and diffusion method, applied in solid diffusion coating, coating, metal material coating process and other directions, can solve the problems of uneven diffusion of silicon element, restricting the performance of high silicon steel, low speed, etc. Ease of mass production, reduced time effects

Active Publication Date: 2015-10-28
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current high-temperature diffusion method still has shortcomings such as high energy consumption, low rate, and uneven diffusion of silicon elements, which seriously restricts the improvement of the performance of 6.5% Si high-silicon steel.

Method used

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  • Method and device for continuously preparing high-silicon silicon steel thin strip through current composite diffusion method
  • Method and device for continuously preparing high-silicon silicon steel thin strip through current composite diffusion method

Examples

Experimental program
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Effect test

Embodiment 1

[0027] In this example, see figure 1 and figure 2 , a high-silicon steel thin strip continuous preparation device, including a thin strip winding device and a vacuum heat treatment furnace, the vacuum furnace device is composed of a furnace sleeve 13, a heating element 12, a temperature control device 6, a thermocouple 10, a refractory material 14, a cooling The water inlet valve 5, the cooling water outlet valve 11 and the water cooling casing 15 are composed. The furnace body casing 13 is a corundum casing arranged horizontally, the refractory material 14 is made of refractory fiber, and the heating element 12 is arranged on the outside of the furnace body casing 13 , the refractory material 14 is located between the heating element 12 and the water cooling sleeve 15 to form the body of the vacuum heat treatment furnace, the cooling water inlet valve 5, the cooling water outlet valve 11 and the water cooling sleeve 15 form the body of the vacuum heat treatment furnace Cool...

Embodiment 2

[0033] This embodiment is basically the same as Embodiment 1, especially in that:

[0034] In this example, iron powder and silicon powder were weighed according to the required silicon content, mixed evenly, and a low-silicon steel composite strip was prepared by powder rolling, and direct current or alternating current was applied to the low-silicon steel composite strip, and placed After the diffusion is complete under high temperature conditions, a high-silicon steel strip with uniform content can be obtained.

[0035] In this embodiment, the Fe-Si powder thin ribbon blank is bundled on two coiling devices, put into the vacuum / atmosphere protection vacuum box, and the ribbon is driven by the two coiling devices through the vacuum / atmosphere protection chamber. At the same time, direct current or alternating current is applied to both ends of the strip, and heat treatment and diffusion are carried out under high temperature conditions to promote the uniform diffusion of Fe-...

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Abstract

The invention discloses a method and device for continuously preparing high-silicon silicon steel thin strip through a current composite diffusion method and is applied to the technical field of the silicon steel manufacturing process. According to the method, a silicon steel base strip which is manufactured in advance and is to be processed is placed in a vacuum thermal treatment furnace, and direct current or pulse current with a certain current intensity is applied to the base strip through an external power source; then, the thin strip is located under a proper temperature condition to be subjected to thermal treatment diffusion for proper time. An influence mechanism of current on diffusion can be explained in the mode that under the action of electron wind, thermal balance vacancy concentration in thin strip alloy crystal rises, movement and aggregation of defects such as dislocation and grain boundaries in the crystal are promoted through migration of a large number of electrons, a fast channel is provided for atom migration, and the Fe atom and Si atom diffusion process is accelerated. Compared with a manufacturing method of common high-silicon steel, the diffusion homogenization time of the thin strip can be saved, energy consumption in the technological process is reduced, and therefore cost for manufacturing the high-silicon steel is reduced.

Description

technical field [0001] The invention relates to a method and a device for high-silicon silicon steel thin strips, in particular to a method and a device for continuously preparing high-silicon silicon steel thin strips, which are applied in the technical field of silicon steel material preparation technology. Background technique [0002] Silicon steel is mainly used as the iron core of various motors and transformers, and is an indispensable and important soft magnetic alloy in electric power, electronics and military industries. Electrical steel sheet is the most used magnetic material, and it is an important metal functional material for energy saving, and its performance directly affects the utilization rate of electric energy. Therefore, the development of high-quality silicon steel is of great significance for energy conservation. The silicon content in silicon steel has a great influence on the characteristics of its products. When magnetized in the frequency range o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C10/46C21D6/00C21D1/773C21D1/04C23F17/00
Inventor 钟云波石亚杰周俊峰
Owner SHANGHAI UNIV
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