Features of Magnesium Alloy Protection Technologies in Die Casting

Flux protection for magnesium alloys is now the most common in many industries, but it has many drawbacks. The main one is that it dramatically reduces the quality of casting. The atmosphere’s interaction with molten magnesium can lead to the deterioration of casting quality and an emergency. Therefore, since magnesium melting technologies began, its protection methods have been developed. The most advanced method of protection of magnesium alloys is fluxless melting under a protective layer of gases. This technology has been refined, and pulsed gas feeding has been created. For this purpose, a computer-controlled unit with pulsed protective gas feeding was created. This technology was used in the high-pressure casting of critical parts. The casting results using the new technology were compared with flux protection technology casting. Microstructure studies were carried out, and the results were described. And also, measurements of the microhardness of samples were carried out.