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AssigneesNippondenso Co., Ltd., Hitachi Metals, Ltd.
InventorsYoshitada Katayama, Keizo Takeuchi, Toshiaki Terada, Shinya Sugiura, Hakaru Sasaki, Tsutomu Inui
Estimating the term…
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 Hirayama's equivalent H eq=[Ni %]+1.05 [Mn %]+0.65 [Cr %]+0.35 [Si %]+12.6 [C %] is 20 to 23%; Nickel equivalent Ni eq=[Ni %]+30 [C %]+0.5 [Mn %] is 9 to 12%, and Chromium equivalent Cr eq=[Cr %]+[Mo %]+1.5 [Si %]+0.5 [Nb %] is 16 to 19, wherein % is by weight, is made to have at least one ferromagnetized part having a magnetic flux density B4000 of not less than 0.3T and at least one non-magnetized part having a relative magnetic permeability μ of not more than 1.2 at a temperature of not less than −40° C., as continuously and integrally formed. The non-magnetized part has crystal grain sizes of not more than 30 μm. The metallic member is subjected to by 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.
A composite magnetic member, which comprises a metallic member comprising not more than 0.6 wt % C, 12 to 19 wt % Cr, 6 to 12 wt % Ni, not more than 2 wt % Mn, not more than 2 wt % Mo, and not more than 1 wt % Nb, and having the following properties:
A composite magnetic member, which comprises a metallic member consisting essentially of not more than 0.6 wt % C, 12 to 19 wt % Cr, 6 to 12 wt % Ni, not more than 2 wt % Mn, not more than 2 wt % Mo, and not more than 1 wt % Nb, and the balance Fe and inevitable impurities and having the following properties:
Dependencies are inferred from the claim text.