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High magnetic induction grain-oriented silicon steel and production method thereof

A technology of high magnetic induction orientation and production method, applied in rolling mill control devices, metal rolling, manufacturing tools, etc., can solve the problems of low utilization rate, high heating temperature, large burning loss, etc., to promote perfection and improve product magnetic properties Effect

Active Publication Date: 2009-01-28
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] (2) The slab is heated at high temperature. In order to fully dissolve the inhibitor, the heating temperature can reach up to 1400°C, which has reached the limit level of the traditional heating furnace. Due to the high heating temperature and large burning loss, the heating furnace needs frequent repairs and low utilization rate.
[0024] In addition, the present invention also provides a production method for the above-mentioned silicon steel, which effectively overcomes the disadvantages of high energy consumption and poor productivity in the traditional oriented silicon steel production process.

Method used

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  • High magnetic induction grain-oriented silicon steel and production method thereof
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Effect test

Embodiment 1

[0052] A 500kg vacuum furnace was used to make steel, and the chemical composition of the slab formed by casting is shown in Table 1. The cast slab was heated to 1200°C and held for 2 hours for hot rolling. The final rolling temperature was 1000°C. After rolling, it was cooled by laminar flow and slowly cooled to 710°C for coiling to form a strip steel with a thickness of 2.5mm. The above steel strips are pickled and then cold rolled to 0.30mm, followed by decarburization annealing: 850°C, 140s decarburization annealing; finally MgO coating, and high temperature annealing at 1200°C for 25h. The magnetic properties were measured and the results are also listed in Table 1.

[0053] Table 1 Chemical composition and corresponding magnetic value

[0054]

Embodiment 2

[0056] Using a 500kg vacuum furnace to make steel, the chemical composition (Wt%) of casting slabs is C=0.081, Si=3.8, Als=0.012, N=0.008, Mn=0.05, Sn=0.35, Cu=0.13, P=0.01 , S=0.0020. Heat the slab of this component to 1200°C and keep it warm for 120 minutes, and then perform the following operations respectively:

Embodiment 3

[0064] With 500kg vacuum furnace steelmaking, the chemical composition (Wt%) of casting billet is C=0.081, Si=3.8, Als=0.012, N=0.008, Mn=0.05, Sn=0.35, Cu=0.13, P= 0.01, S=0.0020. For this composition, the slab was heated to 1200°C and held for 120 minutes. The thickness of the three-pass rough rolling varies by 70mm, and the final temperature of the rough rolling is 1050°C. The 3-pass hot finish rolling process is rolled to 2.5mm, and the final hot rolling temperature is 1020°C. Then proceed as follows:

[0065] B1: Directly spray water to cool down to below 500℃ for coiling;

[0066] B2: Spray water to cool to 850°C, then slowly cool to 700°C for coiling.

[0067] Then carry out the following process until the final product: cold rolling to 0.30mm; 850°C, 140s decarburization annealing; finally MgO coating, and high temperature annealing at 1200°C for 25h, the results are shown in Table 3.

[0068] Table 3 Hot rolling coiling process results

[0069]

[0070] Usuall...

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Abstract

The invention discloses a high magnetic induction oriented silicon steel and a production method thereof. The silicon steel comprises the following chemical composition: 0.055wt percent to 0.080wt percent of C, 2.9wt percent to 3.5wt percent of Si, 0.01wt percent to 0.02wt percent of Mn, 0.005wt percent to 0.010wt percent of Als, 0.0050wt percent to 0.0090wt percent of N, 0.25wt percent to 0.55wt percent of Sn, 0.010wt percent to 0.030wt percent of P, 0.10wt percent to 0.20wt percent of Cu, and the rest are Fe and unavoidable impurities. The production method comprises the following steps of: smelting, continuous casting, hot rolling, reeling, cold rolling, decarburizing annealing and high-temperature annealing. The production method effectively overcomes the shortcoming of poor producibility of the prior art and improves the production efficiency as well as the magnetism of the silicon steel.

Description

technical field [0001] The invention relates to a high magnetic induction oriented silicon steel and a production method thereof. Background technique [0002] Silicon steel is an iron-silicon alloy with a silicon content of about 3% and other components mainly iron. It is an indispensable and important soft magnetic alloy for electric power, electronics and military industries. It is also the metal functional material with the largest output. It is mainly used for various motors , generator and transformer core. The classification of silicon steel includes: hot-rolled silicon steel sheet, cold-rolled non-oriented silicon steel sheet, cold-rolled oriented silicon steel sheet. Among them, oriented silicon steel is known as the "top product" of the global steel industry due to its complex production process and strict manufacturing technology. [0003] Silicon steel has significant orientation under the action of a magnetic field: the most easily magnetized direction is the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/16C22C33/00B21B37/00C21D8/02
Inventor 胡卓超李国保孙焕德
Owner BAOSHAN IRON & STEEL CO LTD
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