CONVERSION COATINGS ON MAGNESIUM ALLOY DIE CASTINGS PART 1: THE EFFECT OF TECHNOLOGICAL PARAMETERS OF THE PRESSURE DIE CASTING PPROCESS ON THE QUALITY OF CASTINGS MADE FROM THE AZ91 ALLOY

The article presents the results of research on the selection of optimum technological parameters of the hot-chamber die casting machine operation to make castings in AM50 magnesium alloy, coated next with the decorative and protective coatings. Castings of this type require special care during performance, because in addition to the high mechanical properties and low porosity, they should have a very good surface finish (proper texture and roughness, and absence of surface defects such as flow lines, folds, streaks, etc). For the specified detail (cast handle), a plan of the experiment was developed, according to which studies were carried out on a die-casting stand operating in the POLMAG Foundry to determine the important parameters affecting the surface quality of castings.

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