Production method of high-magnetic-induction-orientation silicon steel

A technology of high magnetic induction orientation and production method, applied in the direction of coating, metal material coating process, solid diffusion coating, etc., can solve the problems of waste of resources, high cost, cumbersome process, etc., to save resources, simplify processes, cost reduction effect

Inactive Publication Date: 2018-02-16
BEIJING SHOUGANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The embodiment of the present invention provides a production method of high magnetic induction oriented silicon steel, which solves the technical problems of cumbersome process, waste of resources and high cost in the production of oriented silicon steel in the prior art, and realizes the guarantee of product performance. Under the premise of simplifying the process, saving resources and reducing the technical effect of cost

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  • Production method of high-magnetic-induction-orientation silicon steel
  • Production method of high-magnetic-induction-orientation silicon steel
  • Production method of high-magnetic-induction-orientation silicon steel

Examples

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Embodiment 1

[0036] Such as figure 1 As shown, the present invention provides a kind of production method of high magnetic induction grain-oriented silicon steel, comprising:

[0037] Step S101: Hot rolling the cast slab to obtain a hot-rolled steel plate, wherein the Als content in the cast slab is greater than 0.025% and less than 0.035%.

[0038] In the specific implementation process, before step S101, it also includes: using a converter to smelt molten iron, and undergoing secondary refining and continuous casting to obtain a slab. Wherein, the composition of the slab includes: 0.03%<C≤0.08%, 2.6%≤Si≤4%, 0.07%≤Mn≤0.2%, 0.005%≤S≤0.01%, 0.025%≤Als≤0.035%, 0.004%≤N≤0.01%, 0.01%≤Sn≤0.05%, the rest is Fe and unavoidable impurities, expressed in weight percent. Among them, C-carbon, Si-silicon, Mn-manganese, S-sulfur, Als-acid-soluble aluminum, N-nitrogen, Sn-tin, Fe-iron.

[0039] In this embodiment, compared with the prior art, the content of Als is increased, thereby compensating for ...

example 1～3

[0064] Example 1~3 : produce high magnetic induction oriented silicon steel according to the production method of high magnetic induction oriented silicon steel provided by the present invention. Hot rolling is carried out on a 1580mm hot rolling line, the cast slab is heated to 1150°C, the thickness of the hot-rolled plate is 2.3mm, and the coiling temperature is 550°C; once cold rolled to a finished product thickness of 0.30mm; at a dew point of 70°C N 2 +H 2 Carry out decarburization annealing at 850°C in the atmosphere, and the decarburization annealing time is 150 seconds; then carry out nitriding treatment at 750°C; after coating MgO spacer, perform high-temperature annealing at 1150°C to 1250°C in a ring furnace.

[0065] The ingredients of Examples 1-3 and Comparative Examples 1-3 are shown in Table 1, the main difference being the Als content; the product properties are shown in Table 2.

[0066] The comparative example carried out the same production process as th...

example 4

[0071] Example 4 : produce high magnetic induction oriented silicon steel according to the production method of high magnetic induction oriented silicon steel provided by the present invention. Hot rolling is carried out on a 1580mm hot rolling line, the cast slab is heated to 1150°C, the thickness of the hot-rolled plate is 2.3mm, and the coiling temperature is 550°C; once cold rolled to a finished product thickness of 0.30mm; at a dew point of 70°C N 2 +H 2 Carry out decarburization annealing at 830°C in the atmosphere, and the decarburization annealing time is 150 seconds; then carry out nitriding treatment at 750°C; after coating MgO spacer, perform high-temperature annealing at 1150°C-1250°C in a ring furnace. The composition of Example 4 is shown in Table 3, and the main difference from Example 1 is to change the decarburization annealing temperature; the product performance is shown in Table 4.

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Abstract

The invention discloses a production method of high-magnetic-induction-orientation silicon steel. The production method comprises the steps that a casting blank is hot-rolled to obtain a hot-rolled steel plate, and the content of Als in the casting blank is larger than 0.025% and smaller than 0.035%; the hot-rolled steel plate is cold-rolled to obtain a cold-rolled steel plate; the cold-rolled steel plate is subjected to decarburization annealing to obtain a decarburization-annealed steel plate; the decarburization-annealed steel plate is nitrogenized to obtain a nitrogenized steel plate; a MgO coating is formed on the surface of the nitrogenized steel plate to obtain a MgO coating steel plate; the MgO coating steel plate is subjected to high-temperature annealing to obtain a high-temperature annealed steel plate; and the surface of the high-temperature annealed steel plate is coated with an insulating coating, and the high-temperature annealed steel plate is stretched and smoothened to obtain the high-magnetic-induction-orientation silicon steel. According to the production method of the high-magnetic-induction-orientation silicon steel, the technical effects that while the product property is ensured, the technology is simplified, the resource is saved, and the cost is reduced are achieved.

Description

technical field [0001] The invention relates to the technical field of metal material processing, in particular to a production method of high magnetic induction oriented silicon steel. Background technique [0002] With the development of the steel market, the requirements for the cost of oriented silicon steel (namely: electrical steel) are getting higher and higher, and the market competition in this field is becoming more and more fierce. Therefore, it is the best way to reduce production costs while ensuring product performance. An important research direction for manufacturing enterprises. [0003] At present, large iron and steel enterprises usually adopt the preparation process of "low temperature slab heating + low temperature nitriding" when producing grain oriented silicon steel. However, there are technical problems such as cumbersome process, waste of resources, and high cost in this process, which cannot meet the production requirements at the present stage. ...

Claims

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Application Information

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IPC IPC(8): C21D8/12C23C8/26C22C38/02C22C38/04C22C38/06
CPCC21D8/1222C21D8/1233C21D8/1255C21D8/1283C22C38/008C22C38/02C22C38/04C22C38/06C23C8/26
Inventor 黎先浩马家骥龚坚王现辉司良英赵鹏飞贺小国李军
Owner BEIJING SHOUGANG CO LTD
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