Method for reducing the formation of beta phase in the form of primary platelet AlSi alloy containing iron, in particular in alloys of Al - Si - Mn - Fe

摘要

Method for reducing the formation of beta phase in the form of primary platelet AlSi alloy containing iron, in particular in alloys of Al - Si - Mn - Fe.Iron is a harmful impurity in aluminum alloys, as he does with that the phases intermetu00e1licas rich in iron, hard and brittle palms during solidification.The most damaging in the microstructure is the beta phase of type Al ~ 5 ~ FeSi, due to their form of tag.The present invention provides a production method of alloy of Al containing iron by controlling and regulating the path of precipitation during solidification in such a way that precipitThe action of intermetu00e1licas phases containing Fe starts with the precipitation of hexagonal phase of Al Fe ~ 2 ~ 8 ~ ~ you. The presence of phase type Al ~ 8 ~ Fe ~ 2 ~ you.The presence of phase type Al ~ 8 ~ Fe ~ 2 ~ itself results in the fact that the beta phase will not develop the morphology of platelet common, but will the nuclear phase of type Al ~ 8 ~ Fe ~ 2 ~ you and cover it.That in turn has a morphology less harmful. In addition, the invention defines the use of thermal analysis as a means to control the morphology of the precipitates.