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http://dx.doi.org/10.3795/KSME-A.2009.33.4.440

Extrusion of Spur Gear Using High-Energy Ball Milled Al-78Zn Powder  

Kim, Jin-Woo (부산대학교 대학원 정밀가공시스템)
Lee, Sang-Jin (부산대학교 대학원 정밀가공시스템)
Lee, Jung-Min (한국국제대학교 기계자동차공학부)
Kim, Byung-Min (부산대학교 기계공학부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.33, no.4, 2009 , pp. 440-446 More about this Journal
Abstract
This paper was designed to fabricate the miniature spur gear with pitch circle of 2.25mm using extrusion process of a mechanically alloyed Al-78wt%Zn powder. The mechanical alloying of the powder particles were performed for ball milled times of 4h, 8h, 16 and 32h by the planetary ball milling. The mechanical properties of these alloyed powders, which were compacted and sintered-cylindrical preforms, were estimated using compression test. The results showed that the alloyed powder with average particle size of $10{\mu}m$ milled for 32h has the highest compressive(fractured) strength(288MPa). Extrusions of the miniature spur gear using the alloyed powder were carried out at different extrusion temperatures. Extrusion temperature of $300^{\circ}C$ provided the spur gear with the highest relative density and Vickers hardness and without any surface defects.
Keywords
Powder Extrusion; Mechanical Alloying; Al-Zn Composite Powder; Miniature Spur Gear;
Citations & Related Records

Times Cited By SCOPUS : 3
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