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Silicon steel heat treatment method

A heat treatment method and technology of silicon steel, applied in the field of metal technology, can solve problems such as deterioration of magnetic properties, influence on matrix continuity, complex magnetic domains, etc., and achieve the effects of reducing the quality of silicon steel, facilitating decarburization, and increasing speed

Inactive Publication Date: 2014-09-03
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Oxygen forms various oxides in silicon steel, affecting the continuity of the matrix, especially in silicon steel, it is easy to form a large amount of silicon dioxide, aluminum dioxide and composite inclusions, resulting in the generation of complex magnetic domains and deterioration of magnetic properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A silicon steel heat treatment method, the silicon steel annealing furnace is composed of an inlet sealed chamber, a preheating furnace, an oxidation-free furnace, a No. 1 furnace throat, a radiant tube heating furnace, a soaking furnace, a No. 2 furnace throat, a circulating gas jet cooler, and an outlet sealed chamber composition. The heat treatment steps of silicon steel are as follows:

[0020] 1) The coke oven gas heating method is used to heat the preheating furnace, non-oxidizing furnace, and radiant tube heating furnace. The control temperature of the preheating furnace is 1000 °C, the control temperature of the non-oxidizing furnace is 1100 °C, and the control temperature of the radiant tube heating furnace is 900 °C;

[0021] 2) The soaking furnace is heated by resistance heating, and the temperature of the soaking furnace is controlled at 800°C;

[0022] 3) The annealing furnace is filled with argon-hydrogen mixed protective gas of 80% Ar and 20% H2 to sweep...

Embodiment 2

[0025] A silicon steel heat treatment method, the silicon steel annealing furnace is composed of an inlet sealed chamber, a preheating furnace, an oxidation-free furnace, a No. 1 furnace throat, a radiant tube heating furnace, a soaking furnace, a No. 2 furnace throat, a circulating gas jet cooler, and an outlet sealed chamber Composition; silicon steel heat treatment steps are as follows:

[0026] 1) The coke oven gas heating method is used to heat the preheating furnace, non-oxidizing furnace, and radiant tube heating furnace. The control temperature of the preheating furnace is 1100 °C, the control temperature of the non-oxidizing furnace is 1200 °C, and the control temperature of the radiant tube heating furnace is 950 °C;

[0027] 2) The soaking furnace is heated by resistance heating, and the temperature of the soaking furnace is controlled at 900°C;

[0028] 3) The annealing furnace is filled with argon-hydrogen mixed protective gas of 80% Ar and 20% H2 to sweep the fur...

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Abstract

The invention relates to a silicon steel heat treatment method. A silicon steel annealing furnace is composed of an inlet sealing chamber, a preheating furnace, a non-oxidation furnace, a first furnace throat, a radiant tube heating furnace, a soaking furnace, a second furnace throat, a circulating gas spray cooler and an outlet sealing chamber. The silicon steel heat treatment method comprises the following steps: 1) heating the preheating furnace, non-oxidation furnace and radiant tube heating furnace in a coke oven gas heating mode, and controlling the furnaces to achieve the required temperatures; 2) heating the soaking furnace in a resistance heating mode, and controlling the furnace to achieve the required temperature; 3) charging argon-hydrogen mixed protective gas into the annealing furnace to perform furnace cleaning; and 4) sequentially passing a silicon strip through the inlet sealing chamber, preheating furnace, non-oxidation furnace, first furnace throat, radiant tube heating furnace, soaking furnace, second furnace throat and outlet sealing chamber at a certain operating speed, wherein the circulating gas spray cooler continuously sprays the argon-hydrogen mixed protective gas in the process. The heat treatment process can not easily form the oxide film protection layer, is beneficial to decarbonization, and enhances the performance indexes of the silicon steel.

Description

technical field [0001] The invention relates to the field of metal technology, in particular to a silicon steel heat treatment method. Background technique [0002] Silicon steel is mainly ferrosilicon alloy of iron. It is an indispensable soft magnetic alloy for electric power, electronics and military industries. It is mainly used in the iron cores of various motors, generators and transformers. The performance of silicon steel requires low iron loss, high magnetic induction intensity, smooth surface, good punching performance, good adhesion and weldability of the surface insulation film. [0003] The heat treatment of silicon steel is an important link in the production of higher performance silicon steel. The content of silicon in silicon steel is between 0.5% and 1.7%, which is added during steelmaking. The function of annealing furnace is a physical reaction, which does not affect the silicon content, but increases the silicon grains in silicon steel to reach the leve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D6/00C21D1/26C21D1/74
Inventor 穆家臣胡洪旭
Owner ANGANG STEEL CO LTD
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