한국소성가공학회:학술대회논문집 (Proceedings of the Korean Society for Technology of Plasticity Conference)
- 한국소성가공학회 2009년도 추계학술대회 논문집
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- Pages.449-452
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- 2009
분말 압출 공정에서 온도 유지시간 제어를 통한 미세기어의 내피로성 향상 연구
Improvement of fatigue resistance of the miniature gear by controlling holding time of temperature in the hot powder extrusion process
초록
This paper was designed to fabricate the miniature spur gear with pitch circle of 1.8 by hot extrusion process of mechanically alloyed Zn-22wt%Al powder at various temperature. The mechanical alloying was preformed for ball milled times of 8h, 16h and 32h by the planetary ball milling. Mechanically alloyed powders were compacted cylindrical performs. Extrusions of the miniature spur gear using the alloyed powder were carried out at different extrusion temperatures. The extruded spur gear was sintered for 2h at