Process for preparing primary and eutectic Si micro-treatment treatment of hyper eutectic Al-Si alloy

摘要

The present invention relates to a method for preparing a superfine Al-Si alloy and a co-finishing agent of Si in a process, wherein the composite extruded material obtained by hot extrusion of a mixed powder of Al and Cu-P and an Al-Sr powder has a melting point of It is provided to a method for producing a primary Si micro-treatment agent of an over-process Al-Si alloy by heat treatment at a temperature of. According to the present invention, the simultaneous micronization method by adding phosphorus and Sr is maintained in a low temperature molten metal when Al-CU-P / Al-Sr micronizing agent is used, unlike simultaneous micronization is difficult due to the reaction of P and Sr. Even if the time is short, it is possible to refine the primary and process Si at the same time by one addition, which can be very useful in actual operation.