Method for manufacturing high-silicon steel thin strip

A manufacturing method and high-silicon steel technology, applied in the field of strip steel rolling, can solve the problems of not giving texture characteristics and increasing magnetic induction intensity, and achieve the effects of easy industrial application, optimization of recrystallized texture, and high magnetic permeability

Active Publication Date: 2011-07-20
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the patent does not give the relevant texture characteristics, and according to the provided magnetic data, the magnetic induction intensity sensitive to the texture has not been improved by the recovery treatment

Method used

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  • Method for manufacturing high-silicon steel thin strip
  • Method for manufacturing high-silicon steel thin strip

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The high-silicon steel whose composition is shown in Table 1 was smelted in an intermediate frequency induction furnace and cast into ingots. After the ingot is homogenized at 1200°C for 1 hour, it is forged into a slab with a thickness of 60 mm. The slab is continuously hot-rolled to 1.1mm in the range of 1100-700°C. The hot-rolled sheet is subjected to normalization annealing and pickling at 1050°C for 10 minutes, and then cold-rolled to 0.20mm between 400°C and room temperature. The cold-rolled thin strip is first annealed at low temperature at 640°C for 1 hour, and then annealed at high temperature at 1150°C for 10 seconds to obtain the magnetic induction B of the high-silicon steel strip. 8 It is 1.517T.

[0029] Table 1 Chemical composition of experimental steel (mass percentage)

[0030] Si

Embodiment 2

[0032] The high-silicon steel whose composition is shown in Table 1 was smelted in an intermediate frequency induction furnace and cast into ingots. After the ingot is homogenized at 1200°C for 1 hour, it is forged into a slab with a thickness of 60 mm. The slab is continuously hot-rolled to 1.1mm in the range of 1100-700°C. The hot-rolled sheet is subjected to normalization annealing and pickling at 1050°C for 10 minutes, and then cold-rolled to 0.20mm between 400°C and room temperature. The cold-rolled thin strip is first annealed at a low temperature at 640°C for 1 hour, and then at a high temperature at 900°C for 1 hour to obtain the magnetic induction B of the high-silicon steel strip. 8 It is 1.509T.

Embodiment 3

[0034] The high-silicon steel whose composition is shown in Table 1 was smelted in an intermediate frequency induction furnace and cast into ingots. After the ingot is homogenized at 1200°C for 1 hour, it is forged into a slab with a thickness of 60mm. The slab is continuously hot-rolled to 0.9mm in the range of 1100-680°C. The hot-rolled sheet is subjected to normalization annealing at 950°C for 20 minutes and pickling, and then cold-rolled to 0.30mm between 400°C and room temperature. The cold-rolled thin strip is first annealed at a low temperature at 750°C for 20 minutes, and then annealed at a high temperature at 1200°C for 30 minutes to obtain the magnetic induction B of the high-silicon steel strip. 8 It is 1.438T.

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Abstract

The invention discloses a method for manufacturing a high-silicon steel thin strip, and belongs to the technical field of strip steel rolling. The manufacturing process comprises the following steps of: smelting and casting raw materials to obtain ingots or casting blanks; forging or performing rough rolling to obtain plate blanks; performing hot rolling to obtain steel plates with the thickness of 0.7-4.0mm; performing normalizing annealing on the hot-rolled steel plates; performing cold rolling; and performing final annealing. In the final annealing procedure, multi-step annealing is adopted, namely low-temperature annealing is performed at the temperature of between 600 and 750DEG C and high-temperature annealing is performed at the temperature of between 850 and 1,200DEG C. By controlling the processes of nucleating and growing different recrystallization textures, the recrystallization textures after the final annealing are optimized.

Description

technical field [0001] The invention belongs to the technical field of strip steel rolling, and in particular relates to a method for manufacturing a high-silicon steel thin strip. Background technique [0002] The silicon content is closely related to the properties of silicon steel. With the increase of silicon content, the silicon steel is hard and brittle, and it is difficult to form by rolling. High-silicon steel generally refers to silicon steel with a silicon content of 4.0-7.1 wt%. During cold working, the ordered structure of high-silicon steel leads to its inherent brittleness, which is prone to fracture and edge cracking. At present, there are mainly three solutions for the brittleness of high silicon steel. The first is to adopt rapid solidification to directly produce thin strips, omitting the rolling process (Japanese patent JP5569223). However, this method has disadvantages such as low plate thickness control precision, poor strip surface quality, and limit...

Claims

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Application Information

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IPC IPC(8): B23P15/00C21D9/00C21D1/26C22C38/04
Inventor 沙玉辉左良张芳柳金龙姚勇创
Owner NORTHEASTERN UNIV
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