Improvement of hardfacing process of cobalt based alloys using nanoparticles
asebab@uns.ac.rs
- DOI: https://doi.org/10.5937/zzk1704155B
- Article Type: Original scientific paper
- Language: Serbian/English
- Received: October 2017
- Accepted: --
Abstract
In this paper, the application of TiO₂ nanoparticles in hardfacing of hard, chemical-resistant, cobalt-based alloys is studied. The hardfacing of structural steel specimens is carried out with the manual shielded metal arc welding process. The consumables were nickel chromium alloy as a buffer layer and the cobalt alloy for the finishing layer. Two types of electrodes for hardfacing the control specimen were used. The first was a commercial, unmodified electrode, and the second was the same electrode but modified with TiO₂ nanoparticles in water solution. Infiltration of nanoparticles was carried out in three different durations of 30 seconds, 4 min, and 8 min. The metallographic analysis in cross-section of the hardfaced layer was carried out. Also, the wear resistance test was done in order to study the influence of the infiltrated nanoparticles.
Keywords
manual metal arc welding, hardfacing, cobalt alloys, nano TiO2 particles
Acknowledgements
The paper was originally published in the Proceedings of the Conference Welding 2016, held at Silver Lake, Serbia, from September 14 to 17, 2016.
References
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