Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Production methods of intermediate-frequency oriented silicon steel ultra-thin strip and steel substrate of intermediate-frequency oriented silicon steel ultra-thin strip

A technology of grain-oriented silicon steel and ultra-thin strip, which is applied in the field of preparation of ultra-thin strip of grain-oriented silicon steel for intermediate frequency and its steel substrate, and can solve the problems of growth, small grain size of Goss, and deterioration of performance.

Active Publication Date: 2021-07-30
SHOUGANG ZHIXIN QIAN AN ELECTROMAGNETIC MATERIALS CO LTD
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] During the invention process, the applicant found that there are certain problems in the current ultra-thin strip production process: the Goss grain size of the finished product by the primary recrystallization method is small, and the iron loss is high, so it is necessary to increase the grain size, but due to the existence of A small amount of {114}, {111} oriented grains are prone to abnormal growth, leading to performance deterioration, that is, the texture control is difficult and the stability is poor during annealing; at the same time, the primary recrystallization method is affected by the mother The microstructure and surface state of the base metal will seriously affect the quality of the final product. The slight difference in the microstructure and properties of the base metal, according to the conventional ultra-thin strip annealing process, will eventually cause large fluctuations in the magnetic properties of the ultra-thin strip.

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
  • Production methods of intermediate-frequency oriented silicon steel ultra-thin strip and steel substrate of intermediate-frequency oriented silicon steel ultra-thin strip
  • Production methods of intermediate-frequency oriented silicon steel ultra-thin strip and steel substrate of intermediate-frequency oriented silicon steel ultra-thin strip
  • Production methods of intermediate-frequency oriented silicon steel ultra-thin strip and steel substrate of intermediate-frequency oriented silicon steel ultra-thin strip

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0035] According to a typical implementation of the present invention, a method for preparing an ultra-thin strip of oriented silicon steel for intermediate frequency is provided, the method comprising:

[0036] S1. Cold rolling silicon steel raw materials to obtain silicon steel strips;

[0037] As an optional embodiment, the raw material of the silicon steel is a high magnetic induction oriented silicon steel without a bottom layer.

[0038] With the above design, the pickling link is avoided, thereby realizing energy saving and environmental protection.

[0039] As an optional implementation mode, the magnetic induction intensity B800 of the high magnetic induction grain-oriented silicon steel without a bottom layer is ≥ 1.88T, and the thickness of the high magnetic sense grain-oriented silicon steel without a bottom layer is 0.23mm-0.35mm.

[0040] The reason for controlling the magnetic induction intensity B800≥1.88T of high magnetic induction grain-oriented silicon stee...

Embodiment 1-3

[0068] A method for preparing an ultra-thin strip of oriented silicon steel for intermediate frequency, the method is as follows:

[0069] Grain-oriented silicon steel with a thickness of 0.27mm is adopted, (the magnetic properties of the base metal are as shown in the table below);

[0070] S1. Cold rolling into a thin strip with a specification of 0.08mm: specifically, rolling with a 20-high reversing rolling mill, rolling in two passes: the reduction rate of the first pass is 40%, and the reduction rate of the second pass is 40%. The rate is 60%;

[0071] S2. Adopt 4-stage continuous annealing process; the specific parameters of each stage are as follows, and the atmosphere in the furnace is a pure nitrogen atmosphere with a dew point of -25°C;

[0072] S3. coating an insulating coating;

[0073] S4. drying and sintering.

[0074]

Embodiment 4-6

[0076] A method for preparing an ultra-thin strip of oriented silicon steel for intermediate frequency, the method is as follows:

[0077] Grain-oriented silicon steel with a thickness of 0.23 mm is adopted (the magnetic properties of the base metal are as shown in the table below);

[0078] S1. Cold rolling into a thin strip of 0.05mm specification: specifically, using a 20-high reversing rolling mill for rolling, two-pass rolling: the reduction rate of the first pass is 40%, and the reduction rate of the second pass is 40%. The rate is 60%;

[0079] S2. Adopt 4-stage continuous annealing process; the specific parameters of each stage are as follows, and the atmosphere in the furnace is a pure nitrogen atmosphere with a dew point of -20°C;

[0080] S3. coating an insulating coating;

[0081] S4. drying and sintering.

[0082]

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
Login to View More

Abstract

The invention particularly relates to production methods of an intermediate-frequency oriented silicon steel ultra-thin strip and a steel substrate of the intermediate-frequency oriented silicon steel ultra-thin strip, and belongs to the technical field of production of silicon steel ultra-thin strips. The production method of the steel substrate of the intermediate-frequency oriented silicon steel ultra-thin strip comprises the following steps: conducting cold rolling on a silicon steel raw material to obtain a silicon steel thin strip; and conducting annealing on the silicon steel thin strip to obtain the steel substrate, wherein a continuous annealing technology with at least three sections is adopted for annealing. The intermediate-frequency oriented silicon steel ultra-thin strip produced from the steel substrate produced by adopting the corresponding method has excellent magnetic performance and an excellent shape, multi-section annealing is adopted, stable finished product performance is obtained, the manufacturing technology is simple, the feasibility is high, the non-bottom-layer oriented silicon steel (silicon steel raw material) is adopted as base metal, energy is saved, environmental protection is achieved, the surface quality of a product is good, and the product can meet the use requirements under the condition of an intermediate frequency (higher than or equal to 400 Hz).

Description

technical field [0001] The invention belongs to the technical field of preparation of silicon steel ultra-thin strips, and in particular relates to a preparation method of oriented silicon steel ultra-thin strips for intermediate frequency and steel substrates thereof. Background technique [0002] Silicon steel is mainly used as the iron core material of various motors and transformers, and is an important core functional material in the electronics, electric power and other industries. As the thickness of silicon steel decreases, the eddy current loss continues to decrease, making it more suitable for applications under medium and high frequency conditions. Ultra-thin (thickness<0.1mm) oriented silicon steel has been widely used in electrical facilities, military manufacturing, precision electronics and other fields, and its preparation technology has been highly valued by scholars at home and abroad. [0003] At present, the reported production processes of ultra-thin...

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 Applications(China)
IPC IPC(8): C21D8/12C21D1/26
CPCC21D8/1233C21D8/1244C21D1/26Y02P10/25
Inventor 刘兆月王现辉龚坚胡志远赵松山齐杰斌徐明舟滕仁昊
Owner SHOUGANG ZHIXIN QIAN AN ELECTROMAGNETIC MATERIALS CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products