Other

Kobe Steel, Ltd.

Kabushiki Kaisha Kobe Seiko Sho (kobe Steel, Ltd.)

Yoshikazu Seki

Hiroyuki Mitani

Takehiro Tsuchida

Nobuaki Akagi

Masahiro Murakami

Masaaki Sato

Tetsuya Sawayama

Koji Yamamoto

Kazuhisa Fujisawa

Hiroshi Yaguchi

Yasuhiro Hashimoto

Masaki Amano

Hirofumi Houjou

Yuichi Seki

Akihiko Kagawa

Yasuko Yakou

Hideaki Ushio

Shinya Kawai

Masaaki Satoh

Tsukasa Yuri

Russell T Scott

Kenji Kawai

Hitoshi Sakuma

Masaaki Matsubara

The invention provides an iron-based cleaning powder capable of efficiently decomposing organic halides. The iron-based cleaning powder is made of iron alloy powder or iron powder produced with an atomization process. The iron alloy powder passes a 300 &mgr;m-mesh sieve at a proportion of not less than 90% and has an H -reduction mass loss of 0.1 to 0.8% when it contains 0.3 to 1.1% of Mn. When the iron alloy powder contains 0.2 to 12% of Ni, it has an H -reduction mass loss of 0.1 to 1.0%. The iron powder is used as mixed powder or partially alloyed powder together with Ni-containing powder. The iron powder passes a 300 &mgr;m-mesh sieve at a proportion of not less than 90% and has an H -reduction mass loss of 0.1 to 1.0%. The Ni-containing powder has a Ni content of not less than 40% and passes a 45 &mgr;m-mesh sieve at a proportion of not less than 90%. The iron alloy powder and the iron powder have a martensite structure or a tempered martensite structure.

Iron-based cleaning powder

Disclosed is a powder filling method in which powder is filled in a powder box having a discharging port at its bottom segment, the powder box is moved over a cavity to be targeted while being slid on a die plate, thereafter the powder in the powder box is dropped into the cavity by its own gravitational force and filled there, wherein the powder in the powder box is applied with a mechanical agitation when the powder in the powder box is at least dropped into the cavity in the powder filling method for filling the powder in the powder box while being dropped at least into the cavity.

Powder filling method and powder filling apparatus

A mixed powder useful as a starting material for dust core comprises a uniform mixture of a soft magnetic powder and a binder resin so that the resultant dust core has an electric resistance capable of suppressing an eddy current between the soft magnetic powdery particles and high mechanical strength at room temperatures and also at high temperatures. In the mixed powder, the binder resin is made of a phenolic resin powder which has a methylol groups in the molecule and preferably has an average particle size of 30 &mgr;m or below and wherein when the phenolic resin powder is dissolved in boiling methanol in large excess, a content of an undissolved matter is at least 4 wt % based on the total of the phenolic resin. A dust core obtained from the mixed powder and its fabrication method are also described.

Powder for high strength dust core, high strength dust core and method for making same

Disclosed is a method for the compaction of a soft magnetic powder capable of manufacturing a green compact which has attained high density and high strength, is excellent in mechanical properties and magnetic properties, and does not cause a reduction in electrical resistance. Soft magnetic powder particles individually surface-coated with an insulating vitreous layer containing P, Mg, B, and Fe as essential components are used, and a lubricant is applied to the inner wall surface of a compaction die. The soft magnetic powder is subjected to compaction at from not less than room temperature to less than 50&deg; C. without mixing the lubricant with the soft magnetic powder, followed by annealing at from 50 to 300&deg; C.

Method for the compaction of soft magnetic powder

Mixture for powder metallurgy product and method for producing the same

A method for compacting powders for powder metallurgy comprises packing powders for powder metallurgy formulated with a lubricant in a compacting die applied with a lubricant on inner wall surfaces thereof, and subjecting the powders to warm or hot compaction. The powders contain the lubricant in an amount up to 0.2 wt %, non-inclusive of 0%, based on the total of the powders and the lubricant.

Method for compaction of powders for powder metallurgy

Growing community of inventors

Takasago, Japan

Yoshikazu Seki