What is it about?
The focus of this paper was on the possibility of using Cr3C2-20Ni cermet, produced by mechanically activated synthesis (MAS), as a reinforcement in plasma transferred arc welded (PTAW) and submerged arc welded (SAW) composite hardfacings, based on Ni-based self-fluxing alloy (NiCrSiB) or stainless steel (AISI 316L). More specifically, microstructure, Vickers hardness and wear resistance in abrasive conditions of the hardfacings with and without reinforcements were compared.
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Why is it important?
This study showed that PTAW technology is more suitable for getting hardfacings with Cr3C2-Ni reinforcement, than SAW, because all the Cr3C2-Ni reinforcement dissolved in the molten matrix during welding due to a higher process temperature. It was also demonstrated that despite a higher rate of dissolution of Cr3C2-Ni reinforcement in the stainless steel matrix to be compared with the Ni-based self-fluxing alloy, the wear resistance was a bit better in the case of hardfacings with the stainless steel matrix.
Perspectives
Application of other MAS cermets, e.g. TiC-NiMo, as a reinforcement in PTAW hardfacings would be quite interesting.
Mr. Andrei G. Surzhenkov
Tallinn University of Technology
Read the Original
This page is a summary of: Study of submerged and plasma arc welded composite hardfacings with a novel Cr3C2–Ni reinforcement, Proceedings of the Estonian Academy of Sciences, January 2019, Estonian Academy Publishers,
DOI: 10.3176/proc.2019.2.06.
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