The Effect of Certain Metallic Impurities on the Properties of Zamak 3-Type Zinc-Base Die Casting Alloys

THE DIE CASTING industry .as we know it today is the direct result of the invention and development of die casting machines during the nineteenth century and of reliable alloys in the twentieth. The early machines were designed to cast low melting point metals such as lead .and tin, and their alloys. It was inevitable that, as these die castings were put into service, the demand should arise for stronger materials. Zinc alloys, often containing lead, tin, copper, and aluminum as major constituents, were relatively easy to cast and Stronger than the lead 1and tin alloys. However, it became apparent after a number of years that these zinc alloys tended to become brittle, distort, and corrode, particularly if kept in warm, humid atmospheres. Thus, considerable quantities of zinc-base .alloys were in use before the trouble was realized and effective measures could .be taken to determine the cause of the instability.
Keywords: Alloys, Bars, cadmium, Die Castings, Wrought Alloy, Zamak Alloys, Zinc Co., Die casting, Impact, Impacts, Lead, metals, zinc
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