METHOD FOR PRODUCING IRON-BASED SOFT MAGNETIC COMPOSITE POWDER AND IRON-BASED SOFT MAGNETIC COMPOSITE POWDER

• Main Authors: MASUOKA Hiroyuki, TAKASHITA Takuya, MATSUZAKI Akira, NAKAMURA Takechika
• Format: Patent
• Language: English; French; Japanese
• Published: 07.03.2024
• Subjects: ALLOYS; CASTING; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; FERROUS OR NON-FERROUS ALLOYS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; METALLURGY; PERFORMING OPERATIONS; POWDER METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WORKING METALLIC POWDER

Provided are a method for producing an iron-based soft magnetic composite powder and an iron-based soft magnetic composite powder. The method for producing an iron-based soft magnetic composite powder includes a first mixing step that adds an aluminum dihydrogen tripolyphosphate dihydrate powder to an iron-based soft magnetic powder and stirs and mixes to obtain a first composite powder in which a coating layer of aluminum dihydrogen tripolyphosphate dihydrate has been formed on the surface of the iron-based soft magnetic particles. In the spectrum of the aluminum dihydrogen tripolyphosphate dihydrate powder analyzed by x-ray diffraction, the peak intensity of the (112) plane of the aluminum dihydrogen tripolyphosphate dihydrate is 1.5 times or more the peak intensity of the (102) plane of aluminum orthophosphate. L'invention concerne un procédé de production d'une poudre composite magnétique douce à base de fer, ainsi qu'une poudre composite magnétique douce à base de fer. Le procédé de production d'une poudre composite magnétique douce à base de fer comprend une première étape de mélange qui ajoute une poudre de dihydrate de tripolyphosphate de dihydrogène d'aluminium à une poudre magnétique douce à base de fer, puis agite et mélange pour obtenir une première poudre composite dans laquelle une couche de revêtement de dihydrate de tripolyphosphate de dihydrogène d'aluminium a été formée sur la surface des particules magnétiques douces à base de fer. Dans le spectre de la poudre de dihydrate de tripolyphosphate de dihydrogène d'aluminium analysée par diffraction de rayons X, l'intensité de pic du plan (112) du dihydrate de tripolyphosphate de dihydrogène d'aluminium correspond à 1,5 fois ou plus de l'intensité de pic du plan (102) de l'orthophosphate d'aluminium. 鉄基軟磁性複合粉末の製造方法及び鉄基軟磁性複合粉末を提供する。鉄基軟磁性複合粉末の製造方法は、鉄基軟磁性粉末にトリポリリン酸二水素アルミニウム二水和物粉末を添加して撹拌混合し、鉄基軟磁性粒子の表面にトリポリリン酸二水素アルミニウム二水和物の被覆層が形成された第一複合粉末を得る第一混合工程を含み、トリポリリン酸二水素アルミニウム二水和物粉末をＸ線回折法で分析した場合のスペクトルは、トリポリリン酸二水素アルミニウム二水和物の（１１２）面のピーク強度が、オルトリン酸アルミニウムの（１０２）面のピーク強度の１．５倍以上である。