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Method for producing oriented silicon steel band by continuous casting and rolling of thin plate slab

A technology of thin slab continuous casting and oriented silicon steel, which is applied in the field of steel rolling, can solve the problems of large differences in grain orientation, iron loss and magnetic induction level, slab burning heat energy consumption, and intricate process methods, etc., to achieve The effect of solving the problem of high temperature and easy damage, improving quality and improving production efficiency

Inactive Publication Date: 2006-03-08
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of solid solution and dispersed precipitation of MnS and AlN inhibitors, in the conventional production process, the continuous casting slab needs to be heated at high temperature after the slab is cooled. higher consumption
Due to high-temperature heating of oriented silicon steel, the subsequent rolling, cooling and annealing processes become extremely complicated.
Oriented silicon steel produced by different processes has great differences in iron loss and magnetic induction level due to the great difference in grain orientation and size.
It is very difficult to produce high-quality grain-oriented silicon steel, and the production cost is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] According to this process, the oriented silicon steel matrix element and inhibitor element composition are designed. The composition of oriented silicon steel by mass percentage is: C0.05%, Si3.0%, Mn0.1%, S0.03%, Al0.04 %, N0.006%, Cu0.08%, Sn0.1%, Se0.025%, the balance is Fe.

[0018] The specific rolling process of oriented silicon steel is as follows.

[0019] (1) Using the above-mentioned design composition and smelted molten steel, a thin slab continuous casting machine is used to produce 70mm continuous casting thin slabs, the drawing speed of the thin slabs is 2.5m / min, and the casting slab temperature is 900℃.

[0020] (2) The slab is soaked in a soaking furnace, the soaking temperature is 1100°C, and the time is 35 minutes.

[0021] (3) The soaked thin slab is directly hot-rolled, the start rolling temperature is 1100°C, the final rolling temperature is 920°C, the number of rolling passes is 7, and the thickness after rolling is 2.5mm. The hot-rolled steel strip e...

Embodiment 2

[0027] According to this process, the oriented silicon steel matrix element and inhibitor element composition are designed. The composition of the oriented silicon steel by mass percentage is: C0.025%, Si4.5%, Mn0.02%, S0.01%, Al0.08 %, N0.015%, Cu0.02%, Sn0.06%, Se0.04%, the balance is Fe.

[0028] The specific rolling process of oriented silicon steel is as follows.

[0029] (1) Using the above-mentioned design composition and smelted steel, the thin slab continuous casting machine is used to produce 85mm continuous casting thin slabs, the drawing speed of the thin slabs is 3m / min, and the casting slab temperature is 950℃.

[0030] (2) The slab is soaked in a soaking furnace, the soaking temperature is 1100°C, and the time is 50 minutes.

[0031] (3) The soaked thin slab is directly hot-rolled, the opening temperature is 1100°C, the final rolling temperature is 900°C, the number of rolling passes is 7, and the thickness after rolling is 2.6mm. The hot-rolled steel strip enters t...

Embodiment 3

[0037] According to this process, the oriented silicon steel matrix element and inhibitor element composition are designed. The composition of the oriented silicon steel by mass percentage is: C0.1%, Si2.5%, Mn0.15%, S0.05%, Al0.015 %, N0.003%, Cu0.15%, Sn0.2%, Se0.01%, the balance is Fe.

[0038] The specific rolling process of oriented silicon steel is as follows.

[0039] (1) Using the above-mentioned design composition and smelted steel, the thin slab continuous casting machine is used to produce 90mm continuous casting thin slabs, the drawing speed of the thin slabs is 2m / min, and the casting slab temperature is 1050℃.

[0040] (2) The slab is soaked in a soaking furnace, the soaking temperature is 1150°C, and the time is 60 minutes.

[0041] (3) The soaked thin slab is directly hot rolled, the start-rolling temperature is 1150°C, the final rolling temperature is 950°C, the number of rolling passes is 6, and the thickness after rolling is 3.5mm. The hot-rolled steel strip enter...

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Abstract

A method for producing orientated silicon strip by continuously casting and rolling sheet blank is disclosed. The processing step as follows: continuously cast the sheet blank, equally heat it by a equal-heating furnace, hot continuous roll, normalizing anneal, cold roll, decarburizing anneal, high temperature anneal. In the equal-heating furnace the temperature is controlled at 1050-1150 deg.C, time is 10-120 min. Advantages: the sheet blank cooling procedure is saved to solve the problem of inhibitor precipitation; it uses low temperature heating to replace high temperature heating so as to avoid the damage of heating furnace; reduced energy consumption and raised production efficiency and product quality.

Description

Technical field [0001] The invention relates to the technical field of steel rolling, in particular to a method for producing oriented silicon steel strip by continuous casting and rolling of thin slabs. Background technique [0002] At present, the process flow commonly used in the production of oriented silicon steel is slab continuous casting, high temperature heating, continuous rolling, normalizing annealing, cold rolling, decarburization annealing, and high temperature annealing. [0003] In order to obtain an excellent Gaussian orientation texture, it is usually necessary to add Mn, S, Al, and N elements to form inhibitors with MnS and AlN as the main components, and to make the coarse MnS and AlN inhibitors completely solid solution during heating , The heating temperature of ordinary oriented silicon steel casting slabs needs to be ensured at 1350~1370℃. However, due to the high content of Mn and S in high magnetic induction oriented silicon steel, the heating temperatur...

Claims

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Application Information

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IPC IPC(8): B23P23/04B21B1/46C21D3/04C21D9/52C22C38/16
Inventor 王国栋李长生刘相华
Owner NORTHEASTERN UNIV
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