Stock material or miscellaneous articles – All metal or with adjacent metals – Having magnetic properties – or preformed fiber orientation...
Patent
1996-12-06
1998-10-13
Nuzzolillo, M.
Stock material or miscellaneous articles
All metal or with adjacent metals
Having magnetic properties, or preformed fiber orientation...
428692, 428610, 428928, 148312, 148902, 148121, 148122, 148307, 148309, 148310, 148319, H01F 100
Patent
active
058210008
ABSTRACT:
A composite magnetic member formed of a single material having a ferromagnetic section with high soft magnetism and a non-magnetic or the like section with sufficiently low magnetic (feebly magnetized or non-magnetic) and sufficient low MS temperature and a process for producing the member are provided. A composite magnetic member made of a single material of martensitic stainless steel including Ni having two sections of a ferromagnetic section having maximum permeability not less than 200 and coercive force not more than 2000 A/m and a feebly magnetized section having permeability not more than 2 and MS temperature not more than -30.degree. C. A process for producing a composite magnetic member, comprising the steps of locally heating a single material of martensitic stainless steel having particular composition including Ni and having ferrite and carbide, at temperature of more than austenite transformation temperature, and rapidly quenching it so that austenite structure is formed in the heated and quenched section which structure has MS temperature not more than -30.degree. C.
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Inui Tsutomu
Shimizu Masaki
Sugiura Shinya
Sunakawa Jun
Takeuchi Keizo
Hitachi Metals, Ltd. and Denso Corporation
Nuzzolillo M.
VerSteeg Steven H.
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