Controlled Precipitation Gaseous Cavities in Aluminium Castings

• Autorzy: Roučka J. , Hotař J.

Identyfikatory

DOI

10.1515/afe-2015-0091

• Języki publikacji: EN

Abstrakty

EN

At thermal junctions of aluminium alloy castings and at points where risering proves to be difficult there appear internal or external shrinkages, which are both functionally and aesthetically inadmissible. Applying the Probat Fluss Mikro 100 agent, which is based on nano-oxides of aluminium, results in the appearance of a large amount of fine microscopic pores, which compensate for the shrinking of metal. Experimental tests with gravity die casting of AlSi8Cu3 and AlSi10Mg alloys have confirmed that the effect of the agent can be of advantage in foundry practice, leading to the production of castings without local concentrations of defects and without the appearance of shrinkages and macroscopic gas pores. Also, beneficial effect on the mechanical properties of the metal has been observed.

Słowa kluczowe

EN

aluminium alloy; porosity; shrinkage; gassing in melt; pore morphology

PL

stop aluminium; porowatość gazowa; skurcz

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2015
• Tom: Vol. 15, iss. 4
• Strony: 124--128
• Opis fizyczny: Bibliogr. 3 poz., rys., tab., wykr.

Twórcy

autor

Roučka J.

• Department of Foundry Engineering, Brno University of Technology, Faculty of Mechanical Engineering, Institute of Manufacturing Technology, Technická 2, 616 69 Brno, Czech Rep.

autor

Hotař J.

• Department of Foundry Engineering, Brno University of Technology, Faculty of Mechanical Engineering, Institute of Manufacturing Technology, Technická 2, 616 69 Brno, Czech Rep.

Bibliografia

• [1] Vogel, W. (2011). Vermeidung von schwidungsbedingten Gussfehlern durch nanostruktuirte Oxide. Giesserei. 2, 52-63.
• [2] Horký, K. & Vrtílek, J. (2008). Elimination of shrinkage using Probat Fluss MIKRO 100. Slévárenství. 56, 357-358 (Czech).
• [3] Hotař, J. (2012). Influence of controlled gassing of aluminum alloys on structure and properties of castings. Diploma thesis, VUT-FSI Brno.