Manufacturing Technology 2020, 20(3):401-408 | DOI: 10.21062/mft.2020.027

The use of concentrated heat stream to repair AlZn10Si8Mg alloy castings

Mirosław Tupaj¹, Trytek Andrzej¹, Karol Łysiak¹, Wiktoria Zbyrad-Kołodziej¹, Andrzej Łączek¹, Ján Majerník²

¹ Faculty of Mechanics and Technology, Rzeszow University of Technology, ul. Kwiatkowskiego 4, 37-450 Stalowa Wola, Poland

² Faculty of Technology, The Institute of Technology and Business in České Budějovice, Okružní 517/10, 370 01 České Budějovice, Czech Republic

The present paper discusses the possibility to use three different sources of concentrated heat stream to repair superficial defects on AlZn10Si8Mg alloy castings. Simulated defects were prepared on specimens taken from a production casting made with the use of low-pressure casting method. The energy sources used to repair the defect were those known as MIG/MAG, TIG, and ML (micro-laser) methods. As the filler, a AlSi5 welding wire was used. The quality of repair was assessed based on both destructive and non-destructive testing. To evaluate porosity of the performed overlay welds, the computer X-ray tomography technique was employed. Metallographic examination was used to assess macro- and micro-structure of overlay welds, measure geometrical parameters of the welds and the heat-affected zone, and determine values of SDAS microstructure parameter. Hardness of overlay welds and parent material was measured with the use of Brinell hardness machine.

Keywords: Al alloy, defects in castings, concentrated heat stream, computer tomography, metallographic tests

Grants and funding:

Project ‘Establishment of the Scientific and Research Inter-University Laboratory in Stalowa Wola’, Operational Programme Eastern Poland 2007–2013, Priority axis I ‘Modern Economy’, Measure 1.3 ‘Supporting Innovativeness’ as per contract No. POPW.01.03.00-18-016/12-00. 
DS.KO.20.001, Rzeszów University of Technology 2020.

Prepublished online: September 3, 2020; Published: September 7, 2020  Show citation