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1. WO2019049597 - MAGNETO-SENSITIVE WIRE FOR MAGNETIC SENSOR AND PRODUCTION METHOD THEREFOR

Publication Number WO/2019/049597
Publication Date 14.03.2019
International Application No. PCT/JP2018/029826
International Filing Date 08.08.2018
IPC
H01F 1/153 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
1Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
01of inorganic materials
03characterised by their coercivity
12of soft-magnetic materials
14metals or alloys
147Alloys characterised by their composition
153Amorphous metallic alloys, e.g. glassy metals
G01R 33/02 2006.01
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33Arrangements or instruments for measuring magnetic variables
02Measuring direction or magnitude of magnetic fields or magnetic flux
CPC
C22C 19/07
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
19Alloys based on nickel or cobalt
07based on cobalt
C22C 2202/02
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
2202Physical properties
02Magnetic
C22F 1/10
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
1Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
10of nickel or cobalt or alloys based thereon
G01R 33/02
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33Arrangements or instruments for measuring magnetic variables
02Measuring direction or magnitude of magnetic fields or magnetic flux
H01F 1/15316
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
1Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
01of inorganic materials
03characterised by their coercivity
12of soft-magnetic materials
14metals or alloys
147Alloys characterised by their composition
153Amorphous metallic alloys, e.g. glassy metals
15316based on Co
H01F 1/15391
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
1Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
01of inorganic materials
03characterised by their coercivity
12of soft-magnetic materials
14metals or alloys
147Alloys characterised by their composition
153Amorphous metallic alloys, e.g. glassy metals
15391Elongated structures, e.g. wires
Applicants
  • 愛知製鋼株式会社 AICHI STEEL CORPORATION [JP]/[JP]
Inventors
  • 濱田 典彦 HAMADA Norihiko
  • 下出 晃広 SHIMODE Akihiro
Agents
  • 森岡 正往 MORIOKA Masayuki
  • 特許業務法人SANSUI国際特許事務所 SANSUI PATENT FIRM
Priority Data
2017-17371411.09.2017JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) MAGNETO-SENSITIVE WIRE FOR MAGNETIC SENSOR AND PRODUCTION METHOD THEREFOR
(FR) FIL MAGNÉTO-SENSIBLE POUR CAPTEUR MAGNÉTIQUE ET SON PROCÉDÉ DE FABRICATION
(JA) 磁気センサ用感磁ワイヤおよびその製造方法
Abstract
(EN)
Provided is a magneto-sensitive wire (magneto-sensitive body) that extends the measurement range of a magnetic sensor and improves the thermal resistance and high-temperature durability thereof. The magneto-sensitive wire of the present invention comprises a Co-based alloy having a composite structure wherein crystal grains are dispersed in a non-crystalline phase. The Co-based alloy is, for instance, a Co-Fe-Si-B alloy. In this case, it is desirable that the total amount of Si and B is 20 to 25 at% relative to the entirety of the Co-based alloy. It is desirable that the mean diameter for the crystal grains is 70 nm or less, and that the area ratio for the crystal grains relative to the entire composite structure is 10% or less. For the magneto-sensitive wire, for instance, the cross section is circular, and the wire diameter is on the order of 1 to 100 μm. Such a magneto-sensitive wire is obtained, for instance, through a heat processing step of heating a non-crystalline wire comprising the Co-based alloy at a temperature that is the crystallization onset temperature or higher but lower than the crystallization termination temperature. In this case, it is desirable to perform this step while applying a tensile stress onto the non-crystalline wire.
(FR)
La présente invention porte sur un fil magnéto-sensible (corps magnéto-sensible) propre à étendre la plage de mesure d’un capteur magnétique et d’en améliorer la résistance thermique et la durabilité aux températures élevées. Le fil magnéto-sensible selon la présente invention comprend un alliage à base de Co doté d’une structure composite contenant des grains cristallins dispersés dans une phase non cristalline. L’alliage à base de Co est, par exemple, un alliage de Co-Fe-Si-B. Dans ce cas, il est souhaitable que la quantité totale de Si et de B soit de 20 à 25 % en pourcentage atomique rapporté à la totalité de l’alliage à base de Co. Il est souhaitable que le diamètre moyen des grains cristallins soit inférieur ou égal à 70 nm et que le rapport surfacique des grains cristallins rapporté à la totalité de la structure composite soit inférieur ou égal à 10 %. Pour le fil magnéto-sensible, par exemple, la section transversale est circulaire et le diamètre du fil est de l’ordre de 1 à 100 μm. Un tel fil magnéto-sensible est obtenu, par exemple, par le biais d’une étape de traitement thermique consistant à chauffer un fil non cristallin comprenant l’alliage à base de Co pour le porter à une température supérieure ou égale à la température de début de cristallisation mais inférieure à la température de fin de cristallisation. Il est, dans ce cas, souhaitable de réaliser cette étape tout en appliquant une contrainte de traction sur le fil non cristallin.
(JA)
磁気センサの測定レンジの拡大、その耐熱性や高温耐久性の向上等を図れる感磁ワイヤ(感磁体)を提供する。 本発明の感磁ワイヤは、非晶質相中に結晶粒が分散した複合組織を有するCo基合金からなる。Co基合金は、例えば、Co-Fe-Si-B系合金である。このとき、Co基合金全体に対して、SiとBの合計量が20~25at%であると好ましい。結晶粒の平均径は70nm以下であり、複合組織全体に対する結晶粒の面積率は10%以下であると好ましい。感磁ワイヤ、例えば、断面が円形であり、ワイヤ径が1~100μm程度である。このような感磁ワイヤは、例えば、Co基合金からなる非晶質ワイヤを、結晶化開始温度以上かつ結晶化終了温度未満の温度で加熱する熱処理工程により得られる。その際、非晶質ワイヤに引張応力を印加しつつ行うと好ましい。
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