METHOD FOR MANUFACTURING SOFT MAGNETIC POWDER-COMPACT MAGNETIC CORE AND SOFT MAGNETIC POWDER-COMPACT MAGNETIC CORE

• Main Authors: HORINO KENJI, MATSUMOTO HIROYUKI, HIROSE OSAMU, HARADA AKIHIRO, YOSHITOME KAZUHIRO
• Format: Patent
• Language: English; Japanese
• Published: 27.06.2019
• Subjects: ALLOYS; BASIC ELECTRIC ELEMENTS; CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; CHEMISTRY; ELECTRICITY; FERROUS OR NON-FERROUS ALLOYS; INDUCTANCES; MAGNETS; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; METALLURGY; PERFORMING OPERATIONS; POWDER METALLURGY; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TRANSFORMERS; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WORKING METALLIC POWDER

To provide a method for manufacturing a soft magnetic powder-compact magnetic core which is low in coercive force and high in specific resistance, and the other.SOLUTION: A method for manufacturing a soft magnetic powder-compact magnetic core comprises the steps of: obtaining soft magnetic powder made of a soft magnetic alloy; and compacting the soft magnetic powder. In the step of compacting the magnetic powder, the compacting temperature is in a range of 400°C or above and 700°C or below, and the compacting pressure is in a range of 400 MPa or more and 2000 MPa or less. The soft magnetic alloy includes Fe as a primary component; when in a continuous measurement range, Fe contents (atom%) of 80000 or more grids of 1 nm×1 nm×1 nm of the soft magnetic alloy are taken for Y axis, and cumulative frequencies (%) of Fe contents of the grids, which are determined cumulatively from their higher sides, are taken for X axis, the soft magnetic alloy has an inclination of -0.1 to -0.4 for each approximate straight line in a range of 20-80% in cumulative frequency, and is amorphous, of which the rate X of amorphous is 85% or more.SELECTED DRAWING: None 【課題】保磁力が低く、かつ、比抵抗が高い軟磁性圧粉磁心の製造方法等を提供する。【解決手段】軟磁性合金からなる軟磁性粉末を得る工程および軟磁性粉末を成形する工程を有する軟磁性圧粉磁心の製造方法である。軟磁性粉末を成形する工程における成形温度が４００℃以上７００℃以下、成形圧力が４００ＭＰａ以上２０００ＭＰａ以下である。軟磁性合金はＦｅを主成分とし、軟磁性合金の連続した測定範囲における１ｎｍ×１ｎｍ×１ｎｍの８００００個以上のグリッドのＦｅ含有量（原子％）をｙ軸とし、各グリッドのＦｅ含有量が高い順で求めた累計頻度（％）をｘ軸とした場合に、累計頻度２０〜８０％における近似直線の傾き−０．１〜−０．４を有し、非晶質化率Ｘが８５％以上の非晶質である。【選択図】なし