Original scientific paper

A comprehensive investigation of copper tube joints made by resistance soldering

Roman Koleňák ; Slovak University of Technology in Bratislava, Faculty of Materials Science and Technology in Trnava, Paulínska 16, 91701 Trnava, Slovak Republic
Martin Provazník ; Slovak University of Technology in Bratislava, Faculty of Materials Science and Technology in Trnava, Paulínska 16, 91701 Trnava, Slovak Republic
Monika Koleňáková ; Slovak University of Technology in Bratislava, Faculty of Materials Science and Technology in Trnava, Paulínska 16, 91701 Trnava, Slovak Republic

Abstract

The aim of the study was to assess the technological solderability of copper tubes by electric resistance. Soldering by electric resistance is an alternative to classical flame heating. The melting interval of experimental solders was determined by the use of DSC analysis. The most frequently occurring defects in soldered joints were identified and the factors affecting these defects were revealed. The Cu3Sn and Cu6Sn5 phases were observed on the boundary of analysed joints. The average thickness of IMC (intermetallic compounds) on specimens fabricated by resistance soldering was 1,4 μm greater than in the case of flame soldering. The quality of soldered joints fabricated by electric resistance is affected by the factors of heat transfer between the carbon electrodes and soldered tubes.

Keywords

copper pipes; resistance heating; soldering

Hrčak ID:

104063

URI

https://hrcak.srce.hr/104063

Publication date:

15.6.2013.

Article data in other languages: croatian

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