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

Grain-oriented electrical steel sheet and method for producing same

A technology of oriented electrical steel sheets and electrical steel sheets, which is applied in the manufacture of tools, circuits, electrical components, etc., can solve the problems of unsmooth nitriding, complex annealing process of hot-rolled sheets, and difficult decarburization, etc., and achieve the effect of improving magnetic properties

Active Publication Date: 2021-07-30
浦项股份有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this case, very strict manufacturing standards for the manufacture of thin-gauge grain-oriented electrical steel sheets with low iron loss and high magnetic flux density are adopted, that is, the annealing temperature of the hot-rolled sheet is strictly controlled according to the acid-soluble aluminum and the nitrogen content of the matrix steel, Not only the annealing process of the hot-rolled sheet becomes complicated, but also due to Cr with strong oxygen affinity, the oxide layer formed in the decarburization and nitriding annealing process will be formed quite densely, so there are disadvantages that it is not easy to decarburize and cannot be nitrided smoothly

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
  • Grain-oriented electrical steel sheet and method for producing same
  • Grain-oriented electrical steel sheet and method for producing same
  • Grain-oriented electrical steel sheet and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0145] In weight %, the steel contains Si: 3.4%, C: 0.06%, S: 0.005%, N: 0.005%, Al: 0.029%, Sb: 0.027%, Sn: 0.065%, P: 0.030%, Cr: 0.04 % and Co: 0.032%, and the remaining ingredients include the balance of Fe and other unavoidable impurities. The steel is vacuum melted and made into an ingot, then heated at a temperature of 1150 ° C, and then hot rolled into a thickness of 2.3mm. After the hot-rolled sheet is heated to 1085°C, it is kept at 920°C for 160 seconds, and then rapidly cooled in water. Pickle the hot-rolled annealed sheet, then roll it to a thickness of 0.23 mm, and then control the environment of the first heating step, the second heating step and the soaking step according to the degree of oxidation shown in Table 1 below. Maintain and carry out decarburization and nitriding in a mixed gas environment, so that the carbon content is less than or equal to 30ppm, and the nitrogen content reaches 170ppm. The first heating step is carried out on average at normal t...

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
thicknessaaaaaaaaaa
Login to View More

Abstract

A grain-oriented electrical steel sheet according to one embodiment of the present invention comprises: an electrical steel sheet substrate including 2.0-6.0 wt% of Si, 0.005 wt% or less (exclusive of 0 wt%) of C, 0.01-0.05 wt% of Sb, 0.03-0.08 wt% of Sn, 0.01-0.2 wt% of Cr, and 0.0003-0.097 wt% of Co, with the balance being Fe and inevitable impurities; and a metal oxide layer disposed on the surface of the electrical steel sheet substrate, wherein the metal oxide layer includes 0.0005-0.25 wt% of Co.

Description

technical field [0001] The invention relates to a oriented electrical steel plate and a manufacturing method thereof. Specifically, the present invention relates to a method for manufacturing grain-oriented electrical steel sheets, in which the ambient gas is controlled during a recrystallization annealing process, thereby suppressing Co enrichment in the metal oxide layer to improve magnetic properties. Background technique [0002] Grain-oriented electrical steel sheet is a soft magnetic material that has a Goss texture of {110}<001> with respect to the rolling direction, and therefore has excellent magnetic properties in one direction or rolling direction. In order to characterize this texture, complex processes are required, such as composition control in steelmaking, slab reheating in hot rolling, control of hot rolling process parameters, hot rolled sheet annealing heat treatment, cold rolling, primary recrystallization annealing, and secondary annealing. second...

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): C22C38/34C22C38/60C22C38/06C22C38/04C21D8/12C22C38/30C22C38/00
CPCC22C38/34C22C38/04C22C38/06C22C38/30C22C38/60C22C38/004C22C38/008C21D8/1272C21D9/46C21D2201/05C21D6/008C21D1/76C21D8/1255C22C38/001C21D8/1222C21D8/1233C22C2202/02C21D6/002C22C38/002H01F1/147
Inventor 宋大贤朴峻秀
Owner 浦项股份有限公司
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

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com