The Influence of Returnable Material on Internal Homogeneity of the High-Pressure Die-Cast AlSi9Cu3(Fe) Alloy

Nowadays, high-pressure die-casting technology is an integral part of industrial production. High productivity, reduced machining requirements together with the low weight and advantageous properties of aluminium alloys form an ideal combination for the production of numerous components for various...

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Bibliographic Details
Published in:Metals (Basel ) 2021-07, Vol.11 (7), p.1084
Main Authors: Matejka, Marek, Bolibruchová, Dana, Podprocká, Radka
Format: Article
Language:English
Subjects:
Alloys
aluminium alloy AlSi9Cu3
Aluminum base alloys
Casting
Casting alloys
Castings
Crystallization
Die casting
Dies
Homogeneity
HPDC
Hydrogen
Iron
Machining
Mechanical properties
Microhardness
microstructure
Morphology
Oxidation
Porosity
Pressure die casting
returnable material
Structural analysis
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Summary:Nowadays, high-pressure die-casting technology is an integral part of industrial production. High productivity, reduced machining requirements together with the low weight and advantageous properties of aluminium alloys form an ideal combination for the production of numerous components for various industries. The experimental part of the presented article focuses on the analysis of the change in the ratio of returnable material and commercial-purity alloy in a batch depending on the internal homogeneity of castings (microstructure, porosity and microhardness) from AlSi9Cu3(Fe) alloy. The use of returnable material in the batch is a key factor in achieving the maximum use of aluminium melt, which increases the economic efficiency of production and, last but not least, has a more favorable impact on the environment. Structural analysis showed that the increase in returnable material in the batch was visibly manifested in a change in the morphology of the eutectic Si. A negative change in the morphology of the eutectic Si particles was observed after increasing the returnable material content in the batch to 75%. The evaluation of porosity at control cuts showed the influence of the increase of returnable material in the batch, where the worst results were achieved by the alloy with 90% but also the one with 55% returnable material content in the batch.
ISSN:2075-4701
2075-4701
DOI:10.3390/met11071084