摘要:
Fe-Ni, Fe-Ni-Cr or Fe-Ni-Cr-Mo magnetic alloy material, the surface roughness of which is adjusted to Rz.gtoreq.0.5 or Ra.gtoreq.0.06, is disclosed. Parts made of this material has resistance to mutual adhesion or sticking when they are subjected to anealing treatment.
摘要:
In a stepping motor, stator yokes have a plurality of comb-tooth-shaped magnetic poles 5b, 6b, 7b and 8b in such a manner that the comb-tooth-shaped magnetic poles are opposed to each other coaxially to a rotor portion made from a permanent magnet magnetized to have multiple magnetic poles, and an excitation coil is fitted on the external circumference of the stator yokes and the excitation coil and the stator yokes are surrounded by a frame yoke. Each of the yokes is formed of an Fe—Cr alloy having a predetermined ferrite single-phase structure so that occurrence of eddy currents in an alternating-current magnetic field is suppressed.
摘要:
A Fe-Cr soft magnetic material has electric resistivity not less than 50 &mgr;&OHgr;·cm and a metallurgical structure occupied by a ferrite phase at a surface ratio of 95% or more. A number of fine precipitates of 1 &mgr;m or less in particle size is controlled at a ratio not more than 6×105/mm2. The Fe-Cr alloy has the composition (expressed in mass or weight %) of C up to 0.05%, N up to 0.05%, Si up to 3.0%, Mn up to 1.0%, P up to 0.04%, S up to 1.0%, 5.0-20.0% Cr, Al up to 4.0%, 0-3% Mo, 0-0.5% Ti and the balance being essentially Fe under the conditions of (1) and (2). The Fe-Cr soft magnetic material is useful as a core, a yoke or the like installed in various types of magnetic sensors such as electric power steering, fuel injection systems for vehicles and A.C. magnetic circuits of solenoid valves, due to production of high magnetic induction in a high-frequency low-magnetic field: 4.3×%Cr+19.1×%Si+15.1×%Al+2.5×%Mo≧40.2 (1) 64×%Si+35×%Cr+480×%Ti+25×%Mo+490×%Al≧221×%C+247×%N+40×%Mn+80×%Ni+460 (2).
摘要翻译:Fe-Cr软磁材料的电阻率不小于50μΩEG·cm,并且以95%以上的表面比例由铁素体相占据的冶金结构。 将1μm以下的粒径的微细析出物的数量控制在6×10 5 / mm 2以下。 Fe-Cr合金的组成(质量或重量%)C为0.05%以下,N:0.05%以下,Si:3.0%以下,Mn:1.0%以下,P:0.04%以下,S: 1.0%,5.0-20.0%Cr,Al至4.0%,0-3%Mo,0-0.5%Ti,余量基本上为Fe,条件为(1)和(2)。 Fe-Cr软磁性材料可用作安装在诸如电动助力转向器,用于车辆的燃料喷射系统和电磁阀的AC磁路的各种类型的磁传感器中的磁芯,磁轭等,由于产生高磁性 感应高频低磁场: