Development of Gas-Atomized Magnetic Tools

Saito, Tomoshi; Koike, Kazuo; Yamato, Hiroyuki; Kuwana, Akira; Suzuki, Aya; Yamaguchi, Hitomi; Shinmura, Takeo

doi:10.4028/www.scientific.net/kem.291-292.287

Cited by 5 publications

(1 citation statement)

References 6 publications

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“…Magnetic abrasive finishing, which utilizes magnetic force, is one of the most promising processes for the internal finishing of the capillary tubes, and it can achieve highly finished surfaces that conventional techniques never achieve [1,2,3,4]. Although previous research efforts have reported the development of several new magnetic abrasives [5,6,7,8,9,10,11], only iron-based composite powders containing alumina, which are produced by crushing a composite ingot obtained by thermite process of iron oxide and aluminium, are commercially used for internal finishing of capillary tubes at present. The conventional iron-based composite powders containing alumina has irregular shapes with sharp edges and a mean particle size of 80 µm.…”

Section: Introductionmentioning

confidence: 99%

Development of Spherical Iron-Based Composite Powder with Carried Alumina Abrasive Grains by Plasma Spray

Hanada

Yamaguchi

2009

AMR

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This paper describes the development of spherical iron-based composite powder with carried alumina abrasive grains made by a plasma spray technique. Carbonyl iron powder (7.2 μm average size) and alumina abrasive grains (0.3 μm average size) are sprayed into the plasma flame from the respective nozzles simultaneously, or their mechanical mixture is directly plasma-sprayed. In case of the composite powder obtained by the direct spray method, the alumina abrasives are well carried on the carbonyl iron particles. However, a plasma current of more than 100 A causes melting and vaporizing of the alumina abrasives;, consequently the carbonyl iron and alumina abrasives are separated. The magnetic abrasive experiments with the composite powder developed are made for SUS304 stainless steel plate, and the result shows that the developed composite powder has high potential abrasive performance.

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