DefinePK

Abstract

Currently in the aluminum industry for the manufacture of disks for automobile wheel molds, due to increased requirements for the mechanical and casting properties of alloys. Obtaining a given set of physical and mechanical properties is due to both the technology of the alloy and its control for the presence of non-metallic inclusions. The quality of the obtained castings is largely determined by their homogeneity, which, in turn, depends on the amount, size and nature of non-metallic inclusions that form in the casting (ingot) during melting and subsequent crystallization. The content of non-metallic inclusions in the volume of the metal is relatively small, but their presence leads to a significant decrease in the quality of the metal and, as a consequence, the rejection of the finished product. Therefore, the development of new and improvement of existing methods for assessing the degree of contamination of a metal alloy, which makes it possible to reduce the time for conducting research, reduce labor costs and the use of expensive, difficult-to-maintain equipment is an urgent task today. The purpose of this work is to evaluate the method of conducting quantitative analysis to determine the degree of contamination of cast aluminum alloys at different stages of the technological process. Research carried out in the course of the work showed the effectiveness of its application. The use of this technique can significantly reduce the time spent on the analysis. To carry out express control of the degree of contamination of the melt at all stages of the technological process, which makes it possible to improve the quality of the metal and increase the amount of good metal due to timely refining. Investigation of the obtained K-test samples at × 10-50 magnifications allows one to determine the type of inclusion (non-metallic inclusions, oxide film, slag inclusions).