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Cold rolling orientation silicon steel production technology

A production process and technology of oriented silicon steel, applied in the field of metallurgy, can solve the problems of low hit rate of control oriented silicon steel composition, high heating temperature of hot-rolled slab, complicated process, etc. cost effect

Inactive Publication Date: 2010-02-10
JIANGYOU FENGWEI NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to solve the technical problems of traditional cold-rolled oriented silicon steel production technology and complex procedures, high cost, high heating temperature required for hot-rolled slabs, low hit rate of controlled oriented silicon steel components, and two operations for decarburization annealing, etc., to provide A cold-rolled grain-oriented silicon steel production process that simplifies production technology and procedures, reduces production costs, requires low heating temperature for hot-rolled slabs, controls high hit rate of grain-oriented silicon steel components, and requires only one operation for decarburization annealing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The production process of cold-rolled grain-oriented silicon steel of the present invention comprises the following steps:

[0031] a) adding pig iron, IF steel and returned material to electric furnace for smelting, controlling the content of elements C in the furnace charge to be less than 0.1%, and P to be less than 0.01%; the molten steel produced by smelting is poured into the ladle, and the temperature of the aforementioned molten steel is controlled to 1620°C;

[0032] b) Put the ladle in the heating furnace outside the furnace, add 0.1% AL block, 1.5% lime, 0.25% silica, and 0.25% fluorite accounting for the total weight of the furnace charge for smelting. Carbon powder with a total weight of 0.20%; when the S content in the molten steel is 0.003%, the Cu content is regulated to 0.58%, and the C content is 0.30%; the molten steel produced by smelting is poured into the tundish, and the temperature of the aforementioned molten steel is controlled to 1655°C;

[00...

Embodiment 2

[0044] The production process of cold-rolled grain-oriented silicon steel of the present invention comprises the following steps:

[0045] a) adding pig iron, IF steel and returned material to electric furnace for smelting, controlling the content of elements C in the charge to be 0.1% and P to be 0.01%; the molten steel produced by smelting is poured into the ladle, and the temperature of the aforementioned molten steel is controlled to 1680°C;

[0046] b) Place the ladle in a heating furnace outside the furnace, add 0.2% of the total weight of the furnace charge to AL blocks, 2.25% of lime, 0.37% of silica, and 0.37% of fluorite for smelting. Carbon powder with a total weight of 0.30%; when the S content in the molten steel is 0.007%, the Cu content is regulated to 0.64%, and the C content is 0.50%; the molten steel produced by smelting is poured into the tundish, and the temperature of the aforementioned molten steel is controlled to 1695°C;

[0047] c) Place the tundish in...

Embodiment 3

[0058] a) adding pig iron, IF steel and returned material to electric furnace for smelting, controlling the content of elements C in the furnace charge to be less than or equal to 0.1%, and P to be less than or equal to 0.01%; the molten steel produced by smelting is injected into the ladle, and the temperature of the aforementioned molten steel is controlled to 1650°C;

[0059] b) Place the ladle in a heating furnace outside the furnace, add 0.15% of the total weight of the furnace charge to AL block, 2.10% of lime, 0.29% of silica, and 0.29% of fluorite for smelting. Carbon powder with a total weight of 0.25%; when the S content in the molten steel is 0.005%, the Cu content is regulated to 0.59%, and the C content is 0.40%; the molten steel produced by smelting is poured into the tundish, and the temperature of the aforementioned molten steel is controlled to 1675°C;

[0060] c) Place the tundish in a vacuum furnace outside the furnace. If the temperature of the molten steel ...

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Abstract

The invention discloses a cold rolling orientation silicon steel production technology, relating to the technical field of metallurgy, and aiming to solve the technical problems of complex working procedures, high cost, high heating temperature for hot rolling plate blanks, low hit rate of controlling orientation silicon steel components, two-time operation of decarburization and annealing and thelike in the traditional cold rolling orientation silicon steel production technology. The invention comprises the following steps: controlling smelting by an electric stove; refining with an externalfurnace heating furnace and an external furnace vacuum furnace; steel tapping by crane ladle; steel ingot tapping by die casting; cogging; hot rolling; washing shot blast with acid; primary cold rolling; full decarburizing and annealing; secondary cold rolling; annealing and coating with MgO; high-temperature annealing by a bell-type furnace; smoothing a steel band and coating with an insulatinglayer; slitting for cutting edges, and packaging for putting in storage. The invention is suitable for producing cold rolling orientation silicon steel.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a production process of cold-rolled oriented silicon steel. Background technique [0002] Cold-rolled grain-oriented silicon steel is used to manufacture various generators, transformers, and electrical instruments. It is an indispensable energy-saving and consumption-reducing magnetic material in the electric power, electrical, and telecommunications industries. Due to the restriction of high-quality, precise and sophisticated production technology, only a dozen steel mills in the world can produce this product, so the market supply of cold-rolled oriented silicon steel is in short supply, and the current domestic self-sufficiency rate is only 50%. [0003] The production process of cold-rolled grain-oriented silicon steel is complicated, the production cost is high, the technical content is high, the production is difficult, but the added value is also high, and its market p...

Claims

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Application Information

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IPC IPC(8): C21D8/12C21C5/52B22D1/00B21B1/22B21B37/74B21B37/58
CPCY02P10/20
Inventor 刘鹏程
Owner JIANGYOU FENGWEI NEW MATERIAL
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