How to search?
advanced search

Search results

Filters

  • Journals
  • Authors
  • Keywords
  • Date
  • Type

Search results

Number of results: 2
items per page: 25 50 75
Sort by:

Evaluation of the Effect of External Conditions During Crystallization and Solidification on the Final Structure of AlSi7Mg

F. Radkovský M. Gawronová I. Kroupová
Archives of Foundry Engineering | 2023 | vol. 23 | No 1 | 118-123 | DOI: 10.24425/afe.2023.144287
Keywords Gravity casting Silumin Permanent mold eutectic Microstructure
Download PDF Download RIS Download Bibtex

Abstract

The paper deals with the possibilities of influencing the final microstructure of aluminium alloy castings by changing the external conditions of crystallization and solidification. Aluminum alloys, especially Al-Si alloys, are nowadays one of the most used non-ferrous metal alloys, especially due to their mass application in the automotive field. It is in this industry that extreme emphasis is placed on the quality of cast parts with regard to safety. For this reason, a key production parameter is the mastery of the control of the resulting microstructure of the castings and the associated internal quality, which is subject to high demands defined by international standards. The aim of the experiment of this paper is to evaluate the effect of different preheating of the metal mould on the resulting structure and hardness of test castings made of AlSi7Mg0.3 material. The hardness measurement will be evaluated on a hardness tester. The parameter SDAS, Microporosity, Content of excluded eutectic will be evaluated. Dependencies will be found and plotted.
Go to article

Authors and Affiliations

F. Radkovský
1
ORCID: ORCID
M. Gawronová
1
ORCID: ORCID
I. Kroupová
1
ORCID: ORCID
  1. VSB - Technical University of Ostrava, Czech Republic

Some Possibilities of Using Statistical Methods While Solving Poor Quality Production

R. Lakomá L. Čamek P. Lichý I. Kroupová F. Radkovský T. Obzina
Archives of Foundry Engineering | 2021 | vo. 21 | No 1 | 18-22 | DOI: 10.24425/afe.2021.136073
Keywords Poor quality Statistical hypothesis Production process Investment casting Wax pattern
Download PDF Download RIS Download Bibtex

Abstract

This paper presents an overview of a research on six practical cases that were solved in a precise casting company where parts are cast by the mean of the low-wax casting method (investment casting) in order to decrease poor quality production. The steel cast parts production technology by the lost-wax method requires the detailed work procedures observation. On the base of statistical processing data of given types of casting products, it was possible to assess the significance of each particular checking events by using the statistical hypothesis testing. The attention was focused on wax and ceramic departments. The data in technological flow were compared before and after the implementation of the change and statistical confirmative influences were assessed. The target consisted in setting such control manners in order to get the right conditions for decreasing poor quality parts. It was evidenced that the cast part defect cause correct identification and interpretation is important.
Go to article

Bibliography

[1] Elbel, T., Havlíček, F., Jelínek, P., Levíček, P., Rous, J., Stránský, K. (1992). Defects of iron alloy castings (classification, causes and prevention). Brno: MATECS. (in Czech).
[2] Nenadál, J. (2004). Measurement in quality management systems. Praha: Management Press. (in Czech).
[3] Lakomá, R., Čamek, L. (2013). Possibilities for quality control of casting products . In 22nd International Conference on Metallurgy and Materials, Metal, 15th-17th May 2013 (p. 40). Brno, Czech Republic, TANGER s. r. o. Ostrava. ISBN 978-80-87294-39-0.
[4] Plura, J. (2001). Planning and continuous quality improvement. Praha: Computer Press. (in Czech).
[5] Čamek, L., Lichý, P., Kroupová, I., Duda, J., Beňo, J., Korbáš, M., Radkovský, F., Bliznyukov, S. (2016). Effect of cast steel production metallurgy on the emergence of casting defect. Metalurgija. 55(4), 701-704. ISSN 0543-5846.
[6] Jezierski, J., Dojka, K., Kubiak, K., et al. (2016). Experimental approach for optimization of gating system in castings. In 25th International Conference on Metallurgy and Materials, Metal 25th-27th May (pp. 104-109). Brno, Czech Republic, TANGER s. r. o. Ostrava. ISSN 0543-5846.
[7] Jaromin, M., Dojka, R., Jezierski, J., Dojka, M. (2019). Influence of Type and Shape of the Chill on Solidification Process of Steel Casting. Archives of Foundry Engineering. 19(1), 35-40. ISSN (1897-3310).
[8] Richtarech, L., Bolibruchova, D.; Bruna, M.; Caiss, J. (2015). Influence of Nickel Addition on Properties of Secondary AlSi7Mg0.3 Alloy‎. Archives of Foundry Engineering. 15(2), 95-98. ISSN (1897-3310). DOI: 10.1515/afe-2015-0046.
[9] Merta, V., Lána, I. (2020). Manufacturing of Cast-metal Sponges from Copper Alloys. Materiali in Technologije. 54(1), 117-119. DOI: 10.17222/mit.2019.159.
Go to article

Authors and Affiliations

R. Lakomá
1
L. Čamek
2
P. Lichý
2
ORCID: ORCID
I. Kroupová
1
ORCID: ORCID
F. Radkovský
1
ORCID: ORCID
T. Obzina
1
  1. VSB - Technical university of Ostrava, Czech Republic
  2. Brno University of Technology, Czech Republic

This page uses 'cookies'. Learn more