18561412. METHOD OF PRODUCING GRAIN-ORIENTED ELECTRICAL STEEL SHEET simplified abstract (JFE STEEL CORPORATION)

METHOD OF PRODUCING GRAIN-ORIENTED ELECTRICAL STEEL SHEET

Organization Name

JFE STEEL CORPORATION

Inventor(s)

Takeshi Imamura of Chiyoda-ku, Tokyo (JP)

Yukihiro Shingaki of Chiyoda-ku, Tokyo (JP)

Masanori Takenaka of Chiyoda-ku, Tokyo (JP)

Takashi Terashima of Chiyoda-ku, Tokyo (JP)

METHOD OF PRODUCING GRAIN-ORIENTED ELECTRICAL STEEL SHEET - A simplified explanation of the abstract

This abstract first appeared for US patent application 18561412 titled 'METHOD OF PRODUCING GRAIN-ORIENTED ELECTRICAL STEEL SHEET

Simplified Explanation: This patent application discloses a method for producing a grain-oriented electrical steel sheet with excellent magnetic properties and processing accuracy in rounding. The method involves specific heating, rolling, annealing, and decarburization processes to achieve the desired properties.

• Subjecting a steel material to heating to 1300°C or higher and hot rolling
• Cold rolling the resulting sheet with intermediate annealing
• Decarburization annealing and application of an annealing separator
• Final annealing with specific temperature and heating rate conditions

Key Features and Innovation:

• Specific heating and rolling processes to produce a grain-oriented electrical steel sheet with excellent magnetic properties
• Cold rolling with intermediate annealing to improve processing accuracy in rounding
• Decarburization annealing and application of an annealing separator for enhanced properties
• Final annealing with precise temperature and heating rate conditions for optimal results

Potential Applications: This technology can be used in the manufacturing of electrical transformers, motors, and other electrical equipment where high magnetic properties and processing accuracy are required.

Problems Solved: This technology addresses the challenge of maintaining excellent magnetic properties while improving processing accuracy in rounding for grain-oriented electrical steel sheets.

Benefits:

• Improved magnetic properties
• Enhanced processing accuracy in rounding
• Consistent quality and performance in electrical applications

Commercial Applications: The technology can be applied in the production of electrical transformers, motors, generators, and other electrical equipment, catering to industries such as power generation, automotive, and electronics.

Prior Art: Readers can explore prior research on grain-oriented electrical steel production methods, magnetic properties of steel sheets, and annealing processes in the steel industry.

Frequently Updated Research: Stay updated on advancements in grain-oriented electrical steel production, magnetic materials research, and annealing techniques for improved electrical steel properties.

Questions about Grain-Oriented Electrical Steel Production: 1. How does the specific heating and rolling process impact the magnetic properties of the steel sheet? 2. What are the key differences between traditional steel production methods and the method disclosed in this patent application?

Original Abstract Submitted

To provide a grain-oriented electrical steel sheet with good processing accuracy in rounding while maintaining excellent magnetic properties, and a producing method thereof. Disclosed is the method including: subjecting a steel material to heating to 1300° C. or higher and hot rolling, subjecting the resulting sheet directly, or after subjection to hot-rolled sheet annealing, to at least two cycles of cold rolling with intermediate annealing therebetween, decarburization annealing, application of an annealing separator to a surface of the sheet, final annealing, in which maximum arrival temperatures in the first and second cycles of the cold rolling satisfy a predetermined relation, total rolling reductions in the first and second cycles of the cold rolling satisfy a predetermined relation, and in the final annealing, an average heating rates in temperature ranges from 50° C. to 1000° C. and from 1000° C. to (maximum arrival temperature—50° C.) satisfy a predetermined relation.