A combination of a casting process and alloy compositions that result in castings with superior combination of slow creep properties of high temperature, ductility and corrosion performance

摘要

A process for melting a magnesium alloy consisting of 2.0 - 6.00% by weight of aluminum, 3.00 - 8.00% by weight of rare earth metals (RE metals), the ratio between the amount being of RE metals and the amount of aluminum expressed as% by weight greater than 0.8, at least 40% by weight of RE cerium metals, less than 0.5% by weight manganese, less than 1.00% in weight of zinc, less than 0.01% by weight of calcium, less than 0.01% by weight of strontium, and the rest being magnesium and impurities unavoidable, the total impurity level being below 0.1% by weight , in which - the alloy melts into a die whose temperature is controlled in the range of 180-340 ° C, - the die is filled in a time that, expressed in milliseconds, is equal to the product of a number between 5 and 500 multiplied by the thickness of the middle part expressed in millimeters, - the static pressures of the metal are maintained during casting between 20-70 MPa and subsequently intensified until 180 MPa