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

Electrical steel sheet with a layer improving the electrical insulation and method for the production thereof

A technology of electrical steel sheet and electrical insulation, applied in the direction of manufacturing tools, metal material coating process, coating, etc., can solve the problems of electrical steel sheet and its coating not suitable for use, strong corrosion of electrical steel sheet, etc.

Active Publication Date: 2015-12-23
SIEMENS AG
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, as shown, the electrical steel sheets and their coatings available in the above standards are not suitable for all fields of use
In particular, electrical steel sheets are at risk of being strongly corroded when they are exposed to strongly corrosive media such as sour gas (high hydrogen sulfide content)

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
  • Electrical steel sheet with a layer improving the electrical insulation and method for the production thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The figure shows an electrical steel sheet 11 , the upper side 12 and the lower side 13 of which are each provided with a layer 14 of tantalum oxide. This layer 14 rests on a diffusion region 15 which has a common interface 16 with the tantalum oxide layer 12 . After this interface, the concentration of tantalum in the diffusion zone is well over 50%. Towards the interior of the electrical steel sheet 11, the concentration decreases until the concentration is 0% by weight. The boundary between the actual electrical steel sheet 11 and the diffusion zone 15 is therefore not really shown. In this figure, however, regions are shown in which the concentration of tantalum in the structure of the electrical steel sheet 11 exceeds 50%.

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

The invention relates to an electrical steel sheet (11) with a layer (14) improving the electrical insulation. According to the invention, this layer is formed from tantalum oxide or titanium oxide, wherein a diffusion zone (15) that is enriched with tantalum or titanium adjoins toward the interior of the electrical steel sheet (11). This has the advantage that the layer adheres better on the electrical steel sheet (11). Furthermore, the tantalum or titanium of the diffusion zone (15) can also be used as a depot, which has the effect of spontaneously passivating impairments of the layer (14). Therefore, corrosion protection is ensured even when there are impairments of said layer (14). The invention also relates to a method for producing an electrical steel sheet in the way described.

Description

technical field [0001] The invention relates to an electrical steel sheet with a layer for improved electrical insulation. Background technique [0002] According to the prior art, such electrical steel sheets are used for electric drives, for example, in the manufacture of stators. The materials used are regulated by the standard EN10106 (since 1995). The materials mentioned in this standard result in a wide variety of product ranges, whereby the requirements of different applications can be met. The materials that can be used range from low-alloy steels with excellent magnetic permeability, good thermal conductivity and stampability to high-alloy steels with very low remagnetization losses also at higher frequencies. The standard alloy contains copper (<=0.02%), manganese (<=1.2%), silicon (0.1-4.4%), aluminum (0.1-4.4%), phosphorus (<=0.15%), zinc (<=0.2 %) and antimony (<=0.2%) as alloy components in which the sum of the silicon content and twice the al...

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): H01F1/147C23C10/00C23C10/60C21D8/12C23C8/02C23C8/10C23C10/28
CPCC21D1/74C21D8/1277C21D8/1283C21D9/46C23C8/02C23C8/10C23C10/28C23C10/60H01F1/18C21D8/12C23C10/00H01F1/16
Inventor J.D.詹森A.莫尔R.赖歇M.施奈德O.施蒂尔
Owner SIEMENS AG
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