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 deco...

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SELECTED PROBLEMS OF A TECHNOLOGY OF THE AZ91 MAGNESIUM ALLOY MELT TREATMENT

As expected, the increasing demand for magnesium alloy castings has already become a fact. Considering this situation, a rich program of the studies on this particular subject has been initiated and put into operat...

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AN ASSESSMENT OF THE POSSIBILITIES TO SHAPE THE MECHANICAL PROPERTIES OF CAST AZ91 MAGNESIUM ALLOY THROUGH APPLICATION OF PROPER HEAT TREATMENT

The aim of this publication is to assess the effect of different types of the standard heat treatment on changes in mechanical properties at room temperature of magnesium alloy from AZ91 family referred to the same...

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EVALUATING THE EFFECTIVENESS OF SPECIAL HEAT TREATMENT CARRIED OUT ON AZ91 MAGNESIUM ALLOY TO PREVENT THE GRAIN GROWTH

Properly conducted heat treatment of cast magnesium alloys is a very important tool in increasing the mechanical properties of castings. Nevertheless, during high temperature annealing of castings made from magnesi...

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CONVERSION COATINGS ON MAGNESIUM ALLOY DIE CASTINGS PART II: DEVELOPMENT OF A TECHNOLOGY FOR FABRICATION OF DECORATIVE AND PROTECTIVE COATINGS ON MAGNESIUM ALLOY DIE CASTINGS

The article presents the results of investigations of a technology for fabrication of decorative and protective chromate coatings on die castings made from AZ91 (MgAl9Zn1) magnesium alloy. As a result of the investigat...

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A NOVEL METHOD FOR THE OXYGEN ACTIVITY MEASUREMENT APPLIED IN CONTROL OF THE DUCTILE IRON MANUFACTURING PROCESS

The objective of the present study was to evaluate a method for the measurement of oxygen activity in liquid cast iron to predict the cast iron properties after solidification. A series of experimental melts were made, testing the activity of oxyg...

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THE EFFECT OF Ca ADDITION ON THE MICROSTRUCTURE AND MECHANICAL PROPERTIES OF AZ91 ALLOY

This paper presents the results of research work related with the effect of calcium on the microstructure and mechanical properties of AZ91 alloy. Samples of appropriately prepared alloy grades containing the addition of calcium in different conce...

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The effect of the addition of circulating scrap on the tensile properties of die cast magnesium alloy

Recycling of magnesium alloys is a complex issue not only because of their high reactivity and flammability even below melting temperature, but primarily because of a lack of equipment and experience in foundries. Nonetheless the environmental fac...

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Hybrid HPDC&HSC technology

The article presents the history and current state of the technology of external pressure casting in the case of High Pressure Die Casting (HPDC) and Squeeze Casting (SC). The similarities and differences between the two technologies and the commo...

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