High magnetic induction oriented silicon steel and manufacturing method thereof

A technology of high magnetic induction orientation and manufacturing method, which is applied in the field of electrical steel manufacturing, can solve the problems of long production process, large energy consumption, and low yield, and achieve the effect of simple manufacturing method and low energy consumption

Active Publication Date: 2015-10-07
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current production process of high magnetic induction oriented silicon steel is: smelting→secondary refining and alloying→continuous casting→heating→hot rolling→normalization→pickling→cold rolling→decarburization annealing→coating annealing with MgO as the main component Release agent → high temperature annealing → smooth stretching annealing → coating insulation layer → laser treatment → cutting and packaging; the current high magnetic induction oriented silicon steel manufacturing method has serious shortcomings: the production process is complicated, the production process is long, and the cost is very high; To fully dissolve the inhibitor, the continuous casting slab needs ...

Method used

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  • High magnetic induction oriented silicon steel and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The molten steel composition of high magnetic induction oriented silicon steel is: C 0.06%, Si 3.1%, Mn 0.20%, S 0.025%, Als 0.02%, N 0.009%, Ti 0.07%, O8 1.94T; iron loss P 17 / 50 0.95W / kg; thickness 0.27mm;

[0036] The manufacturing method proceeds in the following steps:

[0037] Smelt molten steel according to the set composition, the composition is the same as above;

[0038] A twin-roll strip continuous casting device is used to pour molten steel through the tundish into a cavity composed of two crystallization rollers and two side sealing plates to form a molten pool. The upper surface superheat of the molten pool is controlled at 40°C, and the molten steel in the molten pool Solidify with the rotation of the crystallization roll and lead out at a speed of 20m / min to obtain a cast belt;

[0039] The cast strip is cooled by the cooling unit at a speed of 20°C / s and then hot-rolled. The rolling start temperature is 1100°C, the hot-rolling reduction rate is 34.4%,...

Embodiment 2

[0045] The molten steel composition of high magnetic induction oriented silicon steel is: C 0.01%, Si 2.8%, Mn 0.02%, S 0.025%, Als 0.005%, N 0.003%, Ti 0.5%, Cu 0.3%, Sn 0.1%, O 8 1.91T; iron loss P 17 / 50 0.97W / kg; thickness 0.20mm;

[0046] Smelt molten steel according to the set composition, the composition is the same as above;

[0047] A twin-roll thin strip continuous casting device is used to pour molten steel through the tundish into a cavity composed of two crystallization rollers and two side sealing plates to form a molten pool. The upper surface superheat of the molten pool is controlled at 10°C. Solidify with the rotation of the crystallization roll and lead out at a speed of 50m / min to obtain a cast belt;

[0048] The cast strip is cooled by the cooling unit at a speed of 60°C / s and then hot-rolled. The rolling start temperature is 900°C, the hot-rolling reduction rate is 15%, the final rolling temperature is above 850°C, and the hot-rolling temperature is 60°C...

Embodiment 3

[0054] The molten steel composition of high magnetic induction oriented silicon steel is: C 0.08%, Si 3.4%, Mn 0.30%, S 0.03%, Als 0.05%, N 0.01%, Ti 0.005%, Cu 0.6%, Sn 0.2%, O 8 1.88T; iron loss P 17 / 50 1.03W / kg; thickness 0.23mm;

[0055] Smelt molten steel according to the set composition, the composition is the same as above;

[0056] A twin-roll thin strip continuous casting device is used to pour molten steel through the tundish into a cavity composed of two crystallization rollers and two side sealing plates to form a molten pool. The upper surface superheat of the molten pool is controlled at 70°C. Solidified with the rotation of the crystallization roll and exported at a speed of 80m / min to obtain a cast belt;

[0057] The cast strip is cooled by the cooling unit at a speed of 100°C / s and then hot-rolled. The speed is cooled to below 650°C and coiled;

[0058] The hot-rolled coil is subjected to one-stage normalizing annealing at a temperature of 1150°C for 1 min...

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Abstract

The invention relates to high magnetic induction oriented silicon steel and a manufacturing method thereof. The silicon steel comprises the following components in percentage by mass: 0.01-0.08% of C, 2.8-3.4% of Si, 0.02-0.30% of Mn, 0.010-0.04% of S, 0.005-0.05% of Als, 0.003-0.010% of N, 0.005-0.5% of TI, 0-0.6% of Cu, 0-0.2% of Sn, less than 0.004% of O, less than 0.01% of P and the balance of Fe. The manufacturing method comprises the following steps: (1) smelting molten steel; (2) carrying out continuous casting by adopting a twin-roll strip continuous casting device to obtain a cast strip; (3) cooling and then carrying out hot rolling, and then cooling and coiling; (4) carrying out normalizing annealing on a hot rolled coil, and carrying out controlled cooling to room temperature; (5) carrying out acid washing and then cold rolling, then carrying out decarburizing, and coating an annealing isolation agent; (6) annealing at high temperature, and then carrying out purification annealing. The manufacturing method disclosed by the invention is simple and effective and has the characteristics of short process, easiness in control and low energy consumption; the silicon steel has excellent properties.

Description

technical field [0001] The invention belongs to the field of electrical steel manufacturing, and in particular relates to a high magnetic induction oriented silicon steel and a manufacturing method thereof. Background technique [0002] The silicon content of grain-oriented silicon steel is about 3% (mass fraction), and it is composed of a single Gaussian orientation ({110}<001>) grain. When magnetized along the rolling direction, the magnetic induction is very high and the iron loss is very low. It is mainly used for the production of transformers. Iron core; according to the level of magnetic induction, oriented silicon steel products can be divided into two types: common oriented silicon steel (CGO) and high magnetic induction oriented silicon steel (Hi-B). High magnetic induction oriented silicon steel has higher magnetic induction and lower iron loss . [0003] The current production process of high magnetic induction oriented silicon steel is: smelting→secondary...

Claims

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Application Information

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IPC IPC(8): C22C38/16C21D8/12
Inventor 刘海涛宋红宇张宝光安灵子刘文强赵士淇王银平曹光明李成刚刘振宇王国栋
Owner NORTHEASTERN UNIV
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