Analysis of causes of porosity change of castings under the influence of variable biscuit height in the filling chamber

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F75081431%3A_____%2F21%3A00002239" target="_blank" >RIV/75081431:_____/21:00002239 - isvavai.cz</a>

Result on the web

<a href="https://www.researchgate.net/publication/356178700_Analysis_of_Causes_of_Porosity_Change_of_Castings_under_the_Influence_of_Variable_Biscuit_Height_in_the_Filling_Chamber" target="_blank" >https://www.researchgate.net/publication/356178700_Analysis_of_Causes_of_Porosity_Change_of_Castings_under_the_Influence_of_Variable_Biscuit_Height_in_the_Filling_Chamber</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Analysis of causes of porosity change of castings under the influence of variable biscuit height in the filling chamber

Original language description

Quality properties of castings produced in a die casting process correlate with porosity that is conditioned by a number of factors, which range from input melt quality to setup of technological factors of the die casting, and through structural design of the gating system. One of the primary parameters conditioning the inner soundness of the casting is the liquid metal dose per single operation of die casting. This paper examines the issue of metal dose. The experiments are performed with casting a gate system of an electromotor flange. The gating system examined was die cast with a variable volume of metal dose per single operation. The metal dose was adjusted to reach the height of a biscuit of 10, 20, and 30 mm. The examination of the inner homogeneity of the castings of the individual variants of gating systems with variable height of the biscuit proved that decreasing biscuit height results in an increase of porosity share in the casting volume. The programme MagmaSoft 5.4 revealed the main causes of changes in porosity share. The simulations detected that the change in biscuit height and volume of liquid metal directly influence thermal conditions of the melt in the filling chamber, and in the mould by means of the period in which the holding pressure action is influenced. Simultaneously, the melt flow mode in the sprues and gas entrapment in the melt volume are affected as well. Correlation of the factors consequently influences the final porosity of castings.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20300 - Mechanical engineering

Project

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Continuities

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Materials

ISSN

1996-1944

e-ISSN

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Volume of the periodical

14

Issue of the periodical within the volume

22

Country of publishing house

CH - SWITZERLAND

Number of pages

12

Pages from-to

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UT code for WoS article

000727548200001

EID of the result in the Scopus database

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