Repairs of Damaged Castings Made of Graphitic Cast Iron by Means of Brazing

• Autorzy: Mician M. , Konar R.

Identyfikatory

DOI

10.1515/afe-2017-0097

• Języki publikacji: EN

Abstrakty

EN

The article summarizes the theoretical knowledge from the field of brazing of graphitic cast iron, especially by means of conventional flame brazing using a filler metal based on CuZn (CuZn40SnSi – brass alloy). The experimental part of the thesis presents the results of performance assessment of brazed joints on other than CuZn basis using silicone (CuSi3Mn1) or aluminium bronze (CuAl10Fe). TIG electrical arc was used as a source of heat to melt these filler materials. The results show satisfactory brazed joints with a CuAl10Fe filler metal, while pre-heating is not necessary, which favours this method greatly while repairing sizeable castings. The technological procedure recommends the use of AC current with an increased frequency and a modified balance between positive and negative electric arc polarity to focus the heat on a filler metal without melting the base material. The suitability of the joint is evaluated on the basis of visual inspection, mechanic and metallographic testing.

Słowa kluczowe

EN

castings defects; casting repair; brazing; electric arc

PL

wady odlewów; naprawa odlewu; mosiądz; łuk elektryczny

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2017
• Tom: Vol. 17, iss. 3
• Strony: 91--96
• Opis fizyczny: Bibliogr. 12 poz., fot., rys., tab.

Twórcy

autor

Mician M.

• University of Žilina, Faculty of Mechanical Engineering, Univerzitná 1, 010 01 Žilina, Slovakia

autor

Konar R.

• University of Žilina, Faculty of Mechanical Engineering, Univerzitná 1, 010 01 Žilina, Slovakia

Bibliografia

• [1] Hrivňák, I. (2013). Welding and weldability of materials. 2. vyd. Bratislava : Citadela. (in Slovak).
• [2] Dehťar, V.I. (2012). Repair of cast iron parts using welding and welding. Zvárač. 4, 22- 23. ISSN 1336-5045. (in Slovak).
• [3] Meško, J., Veselko, J. (1999). Welding and repair of graphite cast iron. 1. vyd. Žilina: Žilinská univerzita v Žiline. (in Slovak).
• [4] Sejč, P. & Kubíček, R. (2015). MIG brazing of 304L type stainless steel using CuSi3 and CuSi3MnAl brazing wire. In Kovové materiály. Metallic Materials. 53(5),365-375.
• [5] Orłowicz, A.W., Mróz, M. & Trytek, A. (2007). Application of ultrasound in testing of heat-treated cast iron. Archives of Foundry Engineering. 7(1), 13-18.
• [6] Čep, R., Janasek, A., Čepova, L., Petru, J., Hlavat, I., Car, Z. & Hatala, M. (2013). Experimental Testing of Exchangeable Cutting Inserts Cutting Ability. TEHNICKI VJESNIK-TECHNICAL GAZETTE, 20(1), 21-26, ISSN 1330-3651.
• [7] Bronček, J., Fabian, P. & Radek, N. (2015). Tribological research of properties of heat – treated cast irons with globular graphite. In Materials Science Forum. 818, 209-212.
• [8] Mohyla, P., Tomčík, P., Veneš, L. & Hlavatý, I. (2011). Effect of Post-Welding Heat Treatment on Secondary Hardening of Welded Joints of Cr - Mo - V Steel. Metal Science and Heat Treatment. 53(7-8), 374-378.
• [9] Meško, M., Mičian, M. (2000). Cast irons - types, weldability, flux-cored wires and metal transfer in gas metal arc welding. In: Advanced Manufacturing and Repair Technologies in Vehicle Industry. 17th International Colloquium, Zielona Góra – Łagów. P. 85-89.
• [10] Pastircak, R., Sladek, A. & Kucharcikova, E. (2015). The production of plaster molds with patternless process technology. Archives of Foundry Engineering. 15(2), 91-94.
• [11] Sladek, A., Bolibruchova, D. & Bruna, M. (2010). Effect of filtration on reoxidation proceses in aluminium alloys. Archives of Foundry Engineering. 10(1), 121-126.
• [12] Rózowicz, S., Tofil, S., Zrak, A. (2016). An analysis of the microstructure, macrostructure and microhardness of NiCr-Ir joints produced by laser welding with and without preheat. Archives of Metallurgy and Materials. 61(2b), 1157-1162.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017)