Aluminum casting method
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsYasuhiro Nakao, Hiroto Shoji, Kunitoshi Sugaya, Takashi Kato, Takaharu Echigo, Satoshi Matsuura, Kenichi Kawasaki
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Abstract
An aluminum casting method includes the step of applying in advance a mold release agent including magnesium to a mold surface. Thereafter, a nitrogen gas is injected into a cavity to cause reaction between the magnesium in the surface of the mold release agent and the nitrogen gas, thereby forming magnesium nitride. Since the nitrogen gas reacts only with the magnesium exposed in the surface of the mold release agent, the forming time of the magnesium nitride is reduced and also the amount of nitrogen gas used is reduced.
Claims9
An aluminum casting method, comprising the steps of:
- applying a mold release agent including magnesium to a mold surface;
- forming a cavity with said mold surface to which said mold release agent is applied;
- injecting a nitrogen gas into said cavity to react said nitrogen gas with magnesium, thereby forming magnesium nitride on said mold surface;
- and
- supplying molten aluminum to said cavity in which said magnesium nitride is formed, with an oxide on a surface of said molten aluminum being reduced by said magnesium nitride, to make an aluminum casting inside said cavity.
Dependencies are inferred from the claim text.