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Title: Dual phase magnetic material component and method of forming

Patent ·
OSTI ID:1353059
; ;

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.

Research Organization:
GE Global Research, Niskayuna, New York (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
EE0005573
Assignee:
General Electric Company
Patent Number(s):
9,634,549
Application Number:
14/068,937
OSTI ID:
1353059
Resource Relation:
Patent File Date: 2013 Oct 31
Country of Publication:
United States
Language:
English

References (16)

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Rare earth permanent magnet and method for producing the same patent June 2000
Composite magnetic member excellent in corrosion resistance and method of producing the same patent June 2001
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Method for production of non-oriented electrical steel strip patent May 2008
Non-oriented electrical steel sheets with excellent magnetic properties and method for manufacturing the same patent December 2010
Electromagnetic Machine and System Including Silicon Steel Sheets patent-application January 2013
Dual Phase Magnetic Material Component and Method of Forming patent-application April 2015
Overview: high-nitrogen alloying of stainless steels journal March 1996
Magnetic screw rod using dual state 0.6C–13Cr–Fe bulk magnetic material journal May 2002
Study of internal permanent magnet rotor made of 0.6C–13Cr–Fe dual state magnetic material journal May 2003
A study of retainer ring made of 13.5Cr–0.6C–Fe dual state magnetic material journal January 2003
Fundamental and Innovations in Plasma Assisted Diffusion of Nitrogen and Carbon in Austenitic Stainless Steels and Related Alloys journal July 2009
Phase-Field Modeling of Austenite Formation from a Ferrite plus Pearlite Microstructure during Annealing of Cold-Rolled Dual-Phase Steel journal February 2011
Analysis of Magnetism in High Nitrogen Austenitic Stainless Steel and Its Elimination by High Temperature Gas Nitriding journal December 2011

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