著者

草加 勝司 清水 孝純 洞田 亮 中村 清 大河内 敬雄

出版者

大同特殊鋼株式会社

雑誌

電気製鋼 (ISSN:00118389)

巻号頁・発行日

vol.62, no.2, pp.89-96, 1991-05-01 (Released:2009-05-25)

参考文献数

11

被引用文献数

2 1

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The electronics industry has been abruptly advanced in recent years. On interconnecting microelectronics components with circuit board, solder paste has been used for surface mounted devices to achieve the extreme fineness of the detail of the assemblage.The more complex the surface mounting, the finer solder powder is needed for the paste. On the other hand the finer powder is more easily surface-oxidized. Because surface oxidation of powder prevent sound soldering, finer powder of specific particle size (40 micron under) is usually removed by classification. On considering productivity, it is necessary that solder powder should have particle size in the same range as possible on atomization.In this parper, an investigation has been made of relationship between centrifugal atomization conditions of eutectic solder and its morphologies. The results are summarized below.(1) As atomization disk revolution rate is lowered, particle size distribution becomes narrower.(2) As atomization disk diameter is smaller, particle size distribution becomes narrower.(3) Atomization disk is water-cooled and then particle size distribution becomes narrower.

著者

河野 富夫 洞田 亮 近藤 鉄也

出版者

Japan Society of Powder and Powder Metallurgy

雑誌

粉体および粉末冶金 (ISSN:05328799)

巻号頁・発行日

vol.44, no.11, pp.985-992, 1997-11-15 (Released:2009-05-22)

参考文献数

27

被引用文献数

14 18

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The properties of typical pure Ti and Ti-6Al-4V alloys produced by Metal Injection Molding (MIM) process have been investigated in detail after optimization of the powder characteristic, debinding and sintering conditions for the process.(1) Sintered pure Ti using the blended in equal amount of hydrided-dehydrided and gas-atomized powders has better tensile strength (640MPa) and elongation (21%), which properties are similar to the JIS 3 grade of wrought pure Ti.(2) Sintered Ti-6Al-4V alloys produced by both mixed elemental and prealloyed powders have good tensile strength (970MPa) and elongation (12%), which are almost comparable to those of wrought Ti-6Al-4V alloys.(3) Polishability of sintered pure Ti is generally poor. However, the specific heat treatment leads to fairly improved polishability because of the grain refining which is also favorable for the mechanical properties.