Influence of returning material on porosity of die castings

Eperješi, Ľ.; Malik, J.; Eperješi, Š.; Fecko, D.

doi:10.21062/ujep/x.2013/a/1213-2489/mt/13/1/36

Cited by 14 publications

(2 citation statements)

References 3 publications

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“…The oxide layer formed on the returnable material surface may contain up to 60% aluminium hydroxide. The most suitable batch composition is 100% of the primary new alloy, but at the same time it is the least economically suitable [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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

Matejka

Bolibruchová

Podprocká³

2021

Metals

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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.

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Section: Introductionmentioning

confidence: 99%

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

Matejka

Bolibruchová

Podprocká³

2021

Metals

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“…Aluminum castings cast produced by high-pressure diecasting technology account for 60% of the total consumption of aluminum castings in recent years. Currently, the largest customer of such castings is the automotive industry, where they play an important role as components that must meet high-quality standards [1,2].…”

Section: Introductionmentioning

confidence: 99%

Archives of Foundry Engineering

Matejka,

Bolibruchová,

Podprocká

2021

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The technology of high-pressure die-casting (HPDC) of aluminum alloys is one of the most used and most economical technology for mass production of castings. High-pressure die-casting technology is characterized by the production of complex, thin-walled and dimensionally accurate castings. An important role is placed on the effective reduction of costs in the production process, wherein the combination with the technology of high-pressure die-casting is the possibility of recycling using returnable material. The experimental part of the paper focuses on the analysis of a gradual increase of the returnable material amount in combination with a commercial purity alloy for the production of high-pressure die-castings. The returnable material consisted of the so-called foundry waste (defective castings, venting and gating systems, etc.). The first step of the experimental castings evaluation consisted of numerical simulations, performed to determine the points of the casting, where porosity occurs. In the next step, the evaluation of areal porosity and microstructural analysis was performed on experimental castings with different amounts of returnable material in the batch. The evaluation of the area porosity showed only a small effect of the increased amount of the returnable material in the batch, where the worst results were obtained by the casting of the alloy with 90% but also with 55% of the returnable material in the batch. The microstructure analysis showed that the increase in returnable material in the batch was visibly manifested only by a change in the morphology of the eutectic Si.

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Viertes Kapitel: Die Vorstellung der familia dei im MtEv

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Die ≫familia Dei< In Den Synoptischen Evangelien

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Influence of returning material on porosity of die castings

Cited by 14 publications

References 3 publications

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

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

Archives of Foundry Engineering

Viertes Kapitel: Die Vorstellung der familia dei im MtEv

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