Dual phase magnetic material component and method of forming

Dial, Laura Cerully; DiDomizio, Richard; Johnson, Francis

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Title: Dual phase magnetic material component and method of forming

Abstract

A magnetic component having intermixed first and second regions, and a method of preparing that magnetic component are disclosed. The first region includes a magnetic phase and the second region includes a non-magnetic phase. The method includes mechanically masking pre-selected sections of a surface portion of the component by using a nitrogen stop-off material and heat-treating the component in a nitrogen-rich atmosphere at a temperature greater than about 900.degree. C. Both the first and second regions are substantially free of carbon, or contain only limited amounts of carbon; and the second region includes greater than about 0.1 weight % of nitrogen.

Inventors:: Dial, Laura Cerully; DiDomizio, Richard; Johnson, Francis

Issue Date:: 2019-01-29

Research Org.:: General Electric Co., Schenectady, NY (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1500026

Patent Number(s):: 10190206

Application Number:: 15/460,650

Assignee:: General Electric Company (Schenectady, NY)

Patent Classifications (CPCs):: C - CHEMISTRY C21 - METALLURGY OF IRON C21D - MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS

C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS

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C - CHEMISTRY C21 - METALLURGY OF IRON C21D - MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS
C21D1/06 - Surface hardening
C21D1/26 - Methods of annealing
C21D2221/00 - Treating localised areas of an article
C21D9/00 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles

C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS
C22C38/38 - with more than 1.5% by weight of manganese

C - CHEMISTRY C23 - COATING METALLIC MATERIAL C23C - COATING METALLIC MATERIAL
C23C8/04 - Treatment of selected surface areas, e.g. using masks
C23C8/26 - of ferrous surfaces

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01F - MAGNETS
H01F1/147 - Alloys characterised by their composition {

H - ELECTRICITY H02 - GENERATION H02K - DYNAMO-ELECTRIC MACHINES
H02K15/12 - Impregnating, heating or drying of windings, stators, rotors or machines
H02K19/02 - Synchronous motors
H02K19/103 - {Motors having windings on the stator and a variable reluctance soft-iron rotor without windings}

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DOE Contract Number:: EE0005573

Resource Type:: Patent

Resource Relation:: Patent File Date: 2017 Mar 16

Country of Publication:: United States

Language:: English

Citation Formats


                    Dial, Laura Cerully, DiDomizio, Richard, and Johnson, Francis. Dual phase magnetic material component and method of forming.  United States: N. p., 2019. 
        Web.

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                    Dial, Laura Cerully, DiDomizio, Richard, & Johnson, Francis. Dual phase magnetic material component and method of forming.  United States.

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                    Dial, Laura Cerully, DiDomizio, Richard, and Johnson, Francis. Tue .  
        "Dual phase magnetic material component and method of forming".  United States.  https://www.osti.gov/servlets/purl/1500026.

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@article{osti_1500026,

  title        = {Dual phase magnetic material component and method of forming},

  author       = {Dial, Laura Cerully and DiDomizio, Richard and Johnson, Francis},

  abstractNote = {A magnetic component having intermixed first and second regions, and a method of preparing that magnetic component are disclosed. The first region includes a magnetic phase and the second region includes a non-magnetic phase. The method includes mechanically masking pre-selected sections of a surface portion of the component by using a nitrogen stop-off material and heat-treating the component in a nitrogen-rich atmosphere at a temperature greater than about 900.degree. C. Both the first and second regions are substantially free of carbon, or contain only limited amounts of carbon; and the second region includes greater than about 0.1 weight % of nitrogen.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2019},

  month        = {1}

}

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Works referenced in this record:

High strength, austenitic, non-magnetic alloy
patent, October 1978

Hull, Frederick C.
US Patent Document 4,121,953
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/4121953

Phase-Field Modeling of Austenite Formation from a Ferrite plus Pearlite Microstructure during Annealing of Cold-Rolled Dual-Phase Steel
journal, February 2011

Rudnizki, J.; Böttger, B.; Prahl, U.
Metallurgical and Materials Transactions A, Vol. 42, Issue 8, p. 2516-2525
https://doi.org/10.1007/s11661-011-0626-y

Method for production of non-oriented electrical steel strip
patent, May 2008

Schoen, Jerry W.; Comstock, Robert J.
US Patent Document 7,377,986
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7377986