Metal treatment – Process of modifying or maintaining internal physical... – Magnetic materials
Patent
1994-06-17
1999-02-02
Sheehan, John
Metal treatment
Process of modifying or maintaining internal physical...
Magnetic materials
H01F 1147
Patent
active
058659072
ABSTRACT:
A metallic member including not more than 0.6% C, 12 to 19% Cr, 6 to 12% Ni, not more than 2% Mn, not more than 2% Mo, not more than 1% Nb and the balance being Fe and inevitable impurities, where wherein % is by weight, is made to have at least one ferromagnetized part having a magnetic flux density B.sub.4000 of not less than 0.3 T and at least one non-magnetized part having a relative magnetic permeability .mu. of not more than 1.2 at a temperature of not less than -40.degree. C., as continuously and integrally formed. The non-magnetized part has crystal grain sizes of not more than 30 .mu.m. The metallic member is subjected to ferromagnetization and successive local non-magnetization of part or parts of the ferromagnetized member, and the thus obtained composite magnetic member is employed as a support member such as a sleeve in electromagnetic valves.
REFERENCES:
patent: 2489520 (1949-11-01), Camras et al.
patent: 3953252 (1976-04-01), Levin et al.
patent: 4007073 (1977-02-01), Levin et al.
patent: 4042423 (1977-08-01), Van Den Sype et al.
patent: 4539542 (1985-09-01), Clark
patent: 5174832 (1992-12-01), Schmid et al.
Patent abstract of Japan, vol. 12, No. 433, Nov. 15, 1988, & JP-A-63 161 146.
Hirayama et al: "Influence of Chemical Composition on Martensitic Transformation in Fe-Cr-Ni Stainless Street" Journal of the Society of
Hirayama et al: "Influence of Working Temperature on Martensitic Transformation in Fe-Cr-Ni Stainless Steel" Journal of the Society of
Hirayama et al: "Influence of Working Temperature on Mechanical Properties of Fe-Cr-Ni Stainless Steel" Journal of the Society of Metallurgy, Japan,
Hirayama: "Influence of Cold Reduction on Martensitic Transformation in Fe-Cr-Ni Stainless Steel", Journal of the Society of Metallurgy, Japan,
Inui Tsutomu
Katayama Yoshitada
Sasaki Hakaru
Sugiura Shinya
Takeuchi Keizo
Hitachi Metals Ltd.
Nippondenso Co., Ltd
Sheehan John
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