Abstract
This paper deals with influence on segregation of iron based phases by chrome. Iron is one of the most common impurities that could be found in Al-Si alloys. It is impossible to remove iron from melt by standard operations, but it is possible to eliminate its negative influence by addition of some other elements that affect the segregation of intermetallics in less harmful type. Realization of experiments and results of analysis show new perspective on solubility of iron based phases during melt preparation with higher iron content and influence of chrome as iron corrector of iron based phases. It could be concluded that higher amount of chrome causes the formation of sludge particles.
Highlights
Due to increasing requirements on the quality of castings, final fatigue properties and due to the pressure on price of final castings, it is necessary to search compromises in the casting production from secondary alloys with the presence of various impurities
The increased content of iron in aluminium alloy has a consequent exclusion of intermetallic phases in various forms which affect the final quality and durability of castings
Iron cannot be removed from melt by conventional procedures, but it is possible to eliminate the adverse effect by adding some elements which affect the exclusion of iron intermetallic phases in the less adverse form
Summary
Due to increasing requirements on the quality of castings, final fatigue properties and due to the pressure on price of final castings, it is necessary to search compromises in the casting production from secondary alloys with the presence of various impurities. The increased content of iron in aluminium alloy has a consequent exclusion of intermetallic phases in various forms which affect the final quality and durability of castings. The adverse effect of iron on the final properties of the casting is that it greatly affects the mechanical properties [4 and 5]. Iron cannot be removed from melt by conventional procedures, but it is possible to eliminate the adverse effect by adding some elements which affect the exclusion of iron intermetallic phases in the less adverse form. The presence of chromium, together with iron and manganese can cause the exclusion of so-called ”,sludge” particles [10]
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