THE EFFECT OF THE HARDFACING SEQUENCE ON THE STRUCTURE AND EROSION RESISTANCE OF HIGH CHROMIUM ALLOY

1 GUCWA Marek
Co-authors:
1 BĘCZKOWSKI Robert 2 WYLECIAŁ Tomasz
Institutions:
1 Institute of Mechanical Technology, Częstochowa University of Technology, Armii Krajowej Street 21; 42-201, Częstochowa; PL, mgucwa@spaw.pcz.pl
2 Faculty of Production Engineering and Materials Technology, Częstochowa University of Technology, Armii Krajowej Street 21;42-201, Częstochowa
Conference:
26th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 24th - 26th 2017
Proceedings:
Proceedings 26th International Conference on Metallurgy and Materials
Pages:
1281-1286
ISBN:
978-80-87294-79-6
ISSN:
2694-9296
Published:
9th January 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
22 views / 11 downloads
Abstract

The present work is focused on the influence of the hardfacing sequence on the structure and erosion resistance of deposited layers. In the researche one type of the additional material with high content of 3,8 %C and 22 %Cr was used. The process of hardfacing was made by the flux cored wire arc welding (FCAW) with 2 types of welding sequences. There were implemented string beads and weave bead. The analyzed hardfacing welds showed significant differences in the tested properties. This is due to the nature of the deposition process of the string bead and weave bead. Hardfacing made with string beads had numerous chromium carbide type precipitates of (Fe,Cr)7C3 that is characteristic for the materials deposited on the structure of chromium cast irons. The structure of the hardfacing made with weave bead was characterized by dendritic structure. The differences in the hardness measured in these layers were up to 270 HV. Erosive wear tests were carried out with using corundum and a modified position of the jet milling and with 2 impingement angles.

Keywords: Wear resistant alloys, hardfacing, erosion, welding sequence, hardness
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