METHOD OF CASTING LIGHT ALLOY AND CASTING

摘要

In a method of casting a light alloy to manufacture a casting product through casting, a light alloy composed of a light metal as a base material and an additional element is heated to be melted, and a molten coarse material (the light alloy) is coagulated through cooling. In cooling the molten coarse material (the light alloy), when the coagulated coarse material (the light alloy) is held at a predetermined temperature, the cooling of the coarse material (the light alloy) is carried out such that the time during which the coarse material remains within a separation temperature range, namely, a temperature range corresponding to a shortest elapsed time needed for separation of a solid solution element, which is contained in the light alloy, from the light metal when the light alloy has the solid solution element therein before being heated and when the light alloy is held at a predetermined temperature.