US 11,926,880 B2
Fabrication method for a component having magnetic and non-magnetic dual phases
Shenyan Huang, Niskayuna, NY (US); Min Zou, Niskayuna, NY (US); Steve John Buresh, Latham, NY (US); Wanming Zhang, Clifton Park, NY (US); and Pazhayannur Ramanathan Subramanian, Clifton Park, NY (US)
Assigned to General Electric Company, Schenectady, NY (US)
Filed by General Electric Company, Schenectady, NY (US)
Filed on Apr. 21, 2021, as Appl. No. 17/236,322.
Prior Publication US 2022/0340987 A1, Oct. 27, 2022
Int. Cl. C21D 3/08 (2006.01); C23C 8/04 (2006.01); H02K 15/02 (2006.01); H02K 15/12 (2006.01)
CPC C21D 3/08 (2013.01) [C23C 8/04 (2013.01); H02K 15/02 (2013.01); H02K 15/12 (2013.01); C21D 2211/001 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of forming a dual-phase magnetic component from an initial component comprising a non-magnetic austenite composition and having a surface, the method comprising:
forming a coating on a portion of the surface of the initial component to form a masked area while leaving an unmasked area thereon;
thereafter, heating the initial component to a treatment temperature such that nitrogen diffuses out of the unmasked area of the initial component to transform the non-magnetic austenite composition to a magnetic phase in the unmasked area; and
thereafter, cooling the initial component from the treatment temperature to form a dual-phase magnetic component having a magnetic region corresponding to the unmasked area and a non-magnetic region corresponding to the masked area.