Al-4.5mass%Cu合金鋳物の表面層組織に及ぼす振動の影響 Effects of Vibration on Surface Layer Structure of Al-4.5mass% Cu Alloy Castings
To investigate the effects of vibration on the surface layer of castings and ingots, the droplet of Al-4.5mass%Cu alloy was dropped on a cast iron plate vibrated at a frequency of 2.5∼60kHz, and the temperature change of droplet was measured using a thermocouple during solidification. Discs and predendrites were observed microscopically at the surface layer structure of the droplets. The number of disc and chill crystal formed on the surface of the droplet increased as the frequency increased, but the value of heat transfer coefficient at the droplet-chill plate interface was independent of the frequency. The dendrite arm spacing in the region from the surface of the droplet to 200μm decreased as the frequency increased.
- 鋳造工学 = Journal of Japan Foundry Engineering Society
鋳造工学 = Journal of Japan Foundry Engineering Society 68(4), 313-318, 1996-04-25