Patent ID: 8123877
Filing Date: 2012-02-28
Classification: C22C

Abstract:
1. A process for producing heat-resistant magnesium alloy cast product, the process comprising the steps of: preparing an alloy molten metal including 2.5 to 3.5%-by-mass calcium (Ca), 2.5 to 3.5%-by-mass aluminum (Al), 0.1 to 0.5%-by-mass manganese (Mn) and the rest magnesium (Mg) as well as inevitable impurities and/or trace-amount reforming elements being effective for improving characteristics, wherein the temperature of the alloy molten metal falls in a range of 620 to 640° C.; preheating a metallic casting die with a cavity provided therein, to a die temperature of 130 to 140° C.; pressure pouring the alloy molten metal into the preheated metallic casting die with the cavity provided therein; and solidifying the alloy molten metal undergone the pouring step by cooling at a cooling rate of 300-400° C./minute, thereby obtaining the heat-resistant magnesium alloy cast product.