18278477. SOFT MAGNETIC IRON ALLOY SHEET AND METHOD OF MANUFACTURING THE SAME simplified abstract (Hitachi, Ltd.)
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SOFT MAGNETIC IRON ALLOY SHEET AND METHOD OF MANUFACTURING THE SAME
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SOFT MAGNETIC IRON ALLOY SHEET AND METHOD OF MANUFACTURING THE SAME - A simplified explanation of the abstract
This abstract first appeared for US patent application 18278477 titled 'SOFT MAGNETIC IRON ALLOY SHEET AND METHOD OF MANUFACTURING THE SAME
The abstract describes a soft magnetic iron alloy sheet with properties comparable to Permendur, but with a lower cost and the same iron loss as pure iron.
- The soft magnetic iron alloy sheet contains 30 at % or less of Co, 0.1 at % or more and 11 at % or less of N, and 1.2 at % or less of vanadium, with the remainder being Fe and impurities.
- The sheet has a surface layer region with an average nitrogen concentration of 1 at % or more and 15 at % or less, and an internal region with a lower average nitrogen concentration.
- Iron-nitride martensite with a tetragonal structure is formed in the surface layer region, with a thickness of 1% or more and 30% or less from both main surfaces of the sheet.
Potential Applications: - Electrical transformers - Inductors - Electric motors
Problems Solved: - Cost-effective alternative to Permendur - Reduced iron loss compared to traditional pure iron sheets
Benefits: - Lower cost - Comparable properties to Permendur - Improved performance compared to pure iron sheets
Commercial Applications: - Manufacturing of electrical components - Automotive industry for electric vehicle components
Questions about the technology: 1. How does the nitrogen concentration affect the magnetic properties of the alloy? 2. What advantages does the formation of iron-nitride martensite provide in practical applications?
Original Abstract Submitted
A soft magnetic iron alloy sheet has a saturation magnetic flux density comparable to that of Permendur, with the same iron loss as electromagnetic pure iron, and a lower cost than Permendur. The soft magnetic iron alloy sheet includes, as a chemical composition, 30 at % or less of Co, 0.1 at % or more and 11 at % or less of N, and 1.2 at % or less of vanadium, with the remainder being Fe and impurities. In a thickness direction of the soft magnetic iron alloy sheet, a surface layer region has an average nitrogen concentration of 1 at % or more and 15 at % or less and an internal region has a lower average nitrogen concentration than the surface layer region. In the surface layer region, a thickness is 1% or more and 30% or less from both main surfaces of the sheet and iron-nitride martensite having a tetragonal structure is formed.
