Patent ID: 9555469
Date: 2017-01-31
CPC Classifications: B22D

Claim:
1. A method for producing an aluminum alloy casting, comprising the steps of: pouring a melt of an aluminum alloy containing Fe and Mn into a vessel, vibrating the melt in a completely liquid state using a vibrator at a frequency of 20 to 1000 Hz until the melt is cooled to a solidification starting point of the melt, stopping vibrating of the melt when the melt is cooled to the solidification starting point, and further cooling the melt at a cooling rate higher than a cooling rate at which the melt has been cooled to the solidification starting point, thereby solidifying the melt to obtain an aluminum alloy casting, wherein a metal structure of at least one surface in the aluminum alloy casting contains the Fe in the state of a grain of an Fe—Mn based intermetallic compound, and the metal structure further contains a eutectic silicon having a greatest diameter of 10 μm or less in a two-dimensional surface.