Method for manufacturing non-oriented high-silicon steel cold-rolled sheet based on strip casting and did

A cold-rolled thin plate and thin-strip casting-rolling technology, applied in the field of metallurgy, can solve the problems of low cold processing performance of non-oriented high-silicon steel, deterioration of the magnetic properties of the final product, and unsatisfactory magnetic induction values, and achieve low equipment requirements and room temperature toughness Improve and optimize the effect of magnetic performance

Active Publication Date: 2017-01-11
NORTHEASTERN UNIV LIAONING
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Non-oriented high-silicon steel (Si≈6.5wt.%) has excellent soft magnetic properties, such as high resistance at high frequencies, high magnetic permeability, high magnetization, close to zero magnetostriction, and very low eddy current and hysteresis loss, etc.; therefore, it is an ideal magnetic material in the manufacture of high-frequency motors and transformers; however, as the Si content increases, ordered phases B2 (FeSi) and DO will appear inside it 3 (Fe 3 Si); therefore, the cold workability of non-oriented high-silicon steel is greatly reduced, making it difficult to be produced under the traditional process, especially in the cold rolling process
[0003] Around the 1980s, Japan Steel Tube Corporation (NKK) successfully produced non-oriented high-silicon steel sheets by chemical vapor deposition (CVD), but the magnetic induction value of the final product was not satisfactory; in addition, due to the siliconized substance SiCl 4 The strong toxicity and corrosiveness of silicon steel make the production process very dangerous and low in production efficiency; steel researchers have developed new production methods of 6.5wt.%Si silicon steel sheets in recent years, such as asynchronous rolling method (Chinese Patent No. CN201110020170.2), rapid solidification method (Chinese Patent No. CN201410276483.8), multiple cold rolling method (Chinese Patent No. CN201410314987.4) and alloying method (Chinese Patent No. ) and other production methods, however, the above method is cumbersome to operate and requires high equipment requirements, and the purity of molten steel is reduced due to the addition of other chemical elements, which will deteriorate the magnetic properties of the final product to a certain extent
[0006] At present, the technology of combining thin strip casting and rolling with strain-induced disorder process to prepare non-oriented high-silicon steel has not been reported.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for manufacturing non-oriented high-silicon steel cold-rolled sheet based on strip casting and did
  • Method for manufacturing non-oriented high-silicon steel cold-rolled sheet based on strip casting and did
  • Method for manufacturing non-oriented high-silicon steel cold-rolled sheet based on strip casting and did

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Smelting liquid steel, its composition is C 0.005%, Si 6.5%, N 0.003%, O 0.002%, S 0.004% by weight percentage, and the balance is Fe;

[0030] The molten steel in the molten state is cast and rolled by thin strip casting and rolling equipment, and air-cooled to room temperature to obtain a cast strip with a thickness of 2.5 mm and an equiaxed grain structure with an average grain size of 240 μm; the pouring temperature during casting and rolling is 1565°C; the superheat of molten steel on the upper surface of the molten pool is 10°C during pouring; the appearance of the cast strip is as follows figure 1 As shown, the internal organization is as figure 2 shown;

[0031] The cast strip is hot-rolled into a hot-rolled plate, the rolling speed is 3m / s, the starting temperature of each pass is 1050±10°C, and the total hot-rolling reduction rate is 52%;

[0032] The hot-rolled sheet is warm-rolled into a warm-rolled sheet, and the strain-induced disorder effect occurs dur...

Embodiment 2

[0036] Smelting molten steel, its composition by weight percentage is C 0.004%, Si 6.4%, N 0.003%, O 0.003%, S 0.003%, and the balance is Fe;

[0037]The molten steel in the molten state is cast and rolled by thin strip casting and rolling equipment, and air-cooled to room temperature to obtain a cast strip with a thickness of 3 mm and an equiaxed grain structure with an average grain size of 270 μm; the pouring temperature during casting and rolling is 1570 ℃; the superheat of molten steel on the upper surface of the molten pool is 15℃ during pouring;

[0038] The cast strip is hot-rolled into a hot-rolled plate, the rolling speed is 3m / s, the starting temperature of each pass is 1050±10°C, and the total hot-rolling reduction rate is 57%;

[0039] The hot-rolled sheet is warm-rolled into a warm-rolled sheet, and the strain-induced disorder effect occurs during the warm-rolling process. The starting temperature of each pass is 100±5°C, the final rolling temperature is 80±5°C, ...

Embodiment 3

[0043] Smelting molten steel, its composition is C 0.003%, Si 6.6%, N 0.002%, O 0.003%, S 0.004% by weight percentage, and the balance is Fe;

[0044] The molten steel in the molten state is cast and rolled by thin strip casting and rolling equipment, and air-cooled to room temperature to obtain a cast strip with a thickness of 2.6 mm, an equiaxed grain structure, and an average grain size of 200 μm; the pouring temperature during casting and rolling is 1575°C; the superheat of molten steel on the upper surface of the molten pool is 20°C during pouring;

[0045] The cast strip is hot-rolled into a hot-rolled plate, the rolling speed is 3m / s, the starting temperature of each pass is 1050±10°C, and the total hot-rolling reduction rate is 62%;

[0046] The hot-rolled sheet is warm-rolled into a warm-rolled sheet, and the strain-induced disorder effect occurs during the warm-rolling process. The starting temperature of each pass is 100±5°C, the final rolling temperature is 80±5°C,...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention relates to a method for manufacturing a non-oriented high-silicon steel cold-rolled sheet based on strip cast rolling and DID (deformation induced disordering), belonging to the technical field of metallurgy. The method comprises the following steps: (1) smelting liquid steel, wherein the liquid steel comprises the following components in percentage by weight: less than or equal to 0.005% of C, 6.4%-6.6% of Si, less than or equal to 0.003% of N, less than or equal to 0.003% of O, less than or equal to 0.005% of S and the balance of Fe; (2) carrying out cast rolling by virtue of sheet cast rolling equipment, and carrying out air cooling until reaching the room temperature; (3) manufacturing hot rolled plates by virtue of hot rolling; (4) manufacturing warm rolled plates by virtue of warm rolling, wherein a strain induced disorder effect is generated during the warm rolling; (5) manufacturing cold rolled plates by virtue of cold rolling; and (6) carrying out annealing at 900-1150 DEG C. According to the method, by virtue of a strip cast rolling process, the optimal warm-rolling reduction rate is selected, and an intermediate annealing process is omitted, so that the energy consumption is reduced, the magnetic performance of products after annealing is excellent, the procedures are simple, and equipment requirements are low.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for manufacturing non-oriented high-silicon steel cold-rolled sheets based on strip casting and DID. Background technique [0002] Non-oriented high-silicon steel (Si≈6.5wt.%) has excellent soft magnetic properties, such as high resistance at high frequencies, high magnetic permeability, high magnetization, close to zero magnetostriction, and very low eddy current and hysteresis loss, etc.; therefore, it is an ideal magnetic material in the manufacture of high-frequency motors and transformers; however, as the Si content increases, ordered phases B2 (FeSi) and DO will appear inside 3 (Fe 3 Si); Therefore, the cold workability of non-oriented high-silicon steel is greatly reduced, making it difficult to be produced under the traditional process, especially in the cold rolling process. [0003] Around the 1980s, Japan Steel Tube Company (NKK) successfully...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C21D8/12
Inventor 刘振宇王项龙李昊泽李成刚曹光明王国栋
Owner NORTHEASTERN UNIV LIAONING
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap