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

Grain-oriented electrical steel sheet and method for producing same

A technology of electromagnetic steel sheet and manufacturing method, which is applied in the direction of manufacturing tools, circuits, magnetic objects, etc., can solve the problems of preventing coating peeling off, achieve excellent iron loss reduction effect, prevent coating peeling, and improve corrosion resistance Effect

Active Publication Date: 2022-05-10
JFE STEEL CORP
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, even with electron beam irradiation, if the irradiation energy is increased in order to improve the iron loss improvement effect, there is a problem that the prevention of peeling of the coating cannot be achieved.

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 1

[0095] Manufactured by continuous casting containing C: 0.070 mass%, Si: 3.43 mass%, Mn: 0.08 mass%, Al: 0.005 mass%, N: 0.004 mass%, S: 0.002 mass%, and Sb: 0.02 mass% and the balance A steel slab composed of Fe and unavoidable impurities is heated to a temperature of 1250°C, hot-rolled to make a hot-rolled sheet with a thickness of 2.4mm, and then cold-rolled once to make an intermediate sheet of 1.8mm After performing intermediate annealing at 1100° C. for 20 seconds, secondary cold rolling was performed to produce a cold-rolled sheet with a final thickness of 0.27 mm, and decarburization annealing that doubles as primary recrystallization annealing was performed. The decarburization annealed at 50 vol% H 2 -50vol%N 2 , and carried out under the conditions of 840° C.×100 seconds in a humid atmosphere with a dew point of 55° C.

[0096] Next, the annealing separator containing MgO as the main agent and containing various Sn, Sb, Mo, and W compounds as additive materials in...

Embodiment 2

[0102]Containing C: 0.06% by mass, Si: 3.25% by mass, Mn: 0.07% by mass, Al: 0.015% by mass, N: 0.006% by mass, S: 0.002% by mass and Cu: 0.08% by mass and the balance A steel slab composed of Fe and unavoidable impurities is heated to a temperature of 1380°C and then hot-rolled to form a hot-rolled sheet with a thickness of 2.4 mm. After performing hot-rolled sheet annealing at 1,000°C for 50 seconds, Perform primary cold rolling to obtain an intermediate plate thickness of 1.8 mm, perform intermediate annealing at 1060°C for 20 seconds, perform secondary cold rolling to obtain a final plate thickness of 0.23 mm, and perform primary recrystallization annealing decarburization annealing. The decarburization annealed at 50 vol% H 2 -50vol%N 2 , under the conditions of 840°C x 100 seconds in a humid atmosphere with a dew point of 56°C.

[0103] Next, MgO was used as the main ingredient, and 1% by mass of WO was contained in terms of W. 3 The annealing separating agent is for...

Embodiment 3

[0110] Steel slabs having the various compositions listed in Table 4 with the balance consisting of Fe and unavoidable impurities were manufactured by continuous casting, and steel slabs (Nos. 1 to 3 in Table 4) containing inhibitor-forming components were heated to 1200 °C, the steel slabs (No.4-24 in Table 4) containing the inhibitor-forming components were heated to a temperature of 1380 °C, and then hot-rolled to form a hot-rolled sheet with a thickness of 2.0 mm, and 1030 °C× After the hot-rolled sheet annealing for 10 seconds, cold rolling was performed to obtain a cold-rolled sheet having a final thickness of 0.23 mm, and decarburization annealing serving also as primary recrystallization annealing was performed. The decarburization annealed at 50 vol% H 2 -50vol%N 2 , and performed under the conditions of 840° C.×100 seconds in a humid atmosphere with a dew point of 61° C.

[0111] Next, with MgO as the main ingredient, MoO was contained in an amount of 2% by mass in...

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
Login to View More

Abstract

When a grain-oriented electrical steel sheet is produced by hot rolling, cold rolling, decarburization annealing, application of an annealing separating agent mainly composed of MgO, final annealing, and magnetic domain refinement treatment, an annealing separating agent is used as the annealing separating agent in such a manner that a compound of Sn, Sb, Mo, and W is contained in an amount of 0.3-5 mass% in terms of metal, and in the final annealing, the content of the compound of Sn, Sb, Mo, and W is less than or equal to 0.3 mass% in terms of metal, and the content of the compound of Sn, Sb, Mo, and W is less than or equal to 0.3 mass% in terms of metal. The present invention relates to a method for manufacturing a steel plate, characterized in that the steel plate is held in an inert atmosphere at a temperature of 800-950 DEG C for 10-100 hours, and a dry gas having an H2 content of 1 vol% or more and a dew point of 10 DEG C or less is introduced from 1050 DEG C or more to a purification treatment temperature such that the furnace pressure reaches 3.5 mmH2O or more, the pickling decrement of a substrate coating caused by HCl pickling is 1.8 g / m2 or less, and the total concentration of Sn, Sb, Mo, and W at the coating-steel interface is 0.01-0.15 mass%. A grain-oriented electrical steel sheet having excellent film adhesion can be obtained even when a magnetic domain refinement treatment is performed at a high energy density.

Description

technical field [0001] The present invention relates to a grain-oriented electrical steel sheet and a method for producing the same, and more specifically, to a grain-oriented electrical steel sheet suitable for magnetic domain refining treatment having excellent magnetic properties and coating properties, and a method for manufacturing the same. Background technique [0002] Grain-oriented electrical steel sheets are mainly used as core materials for transformers, and therefore, excellent magnetic properties, especially low iron loss, are strongly required. The above-mentioned grain-oriented electrical steel sheet has conventionally been produced by performing decarburization annealing that doubles as primary recrystallization annealing on a cold-rolled Si-containing steel sheet, coating an annealing separator containing MgO as a main ingredient, and causing secondary recrystallization annealing in final annealing. Recrystallization makes the crystal grains highly aligned t...

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): C21D8/12C22C38/02C22C38/04C23G1/08C22C38/08C22C38/34C22C38/16C22C38/60C22C38/12C22C38/32C22C38/14C22C38/20C22C38/22C22C38/24C22C38/26C22C38/28C22C38/40C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50C22C38/54
CPCC21D8/1283C22C38/02C22C38/04C23G1/08C21D8/1272C21D8/1255C22C38/08C22C38/34C22C38/16C22C38/008C22C38/60C22C38/002C22C38/12C22C38/32C22C38/14C22C38/20C22C38/22C22C38/24C22C38/26C22C38/28C22C38/40C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50C22C38/54C21D2201/05C21D6/008C21D3/04C21D1/76C21D1/26C21D9/46C21D8/1294C22C38/004C22C38/38H01F1/18H01F1/14708Y02P10/20C21D8/1222C21D8/1233H01F1/147C21D1/74C21D6/001C21D6/002C21D6/004C21D6/005C21D8/1261C21D8/1266C22C38/001C22C38/06C22C2202/02H01F1/14783
Inventor 渡边诚末宗圣启今村猛
Owner JFE STEEL CORP
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