Browsing by Subject "hardfacing"

Now showing 1 - 2 of 2

Access status: Open Access ,
Possibilities of manufacturing spatial elements using the 135 hardfacing method
(Wydawnictwa AGH, 2023) Góral, Tomasz; Krawczyk, Stanisław; Pawlik, Jan
3D printing with thermoplastic materials is slowly becoming commonplace as additive manufacturing has gained a large number of dedicated users over the past few years, and the prices of the requisite equipment have significantly dropped. However, in terms of materials, only plastics have enjoyed this popularity. Although metals are, in a sense, thermoplastic materials, their spatial application would require very advanced setups, which in turn generates high costs and complicates process control. This article discusses the possibilities of the additive manufacturing of metal elements using a three-axis numerically controlled plotter combined with a semi-automatic welding machine using the 135 method. The authors also examined the impact of sudden changes in velocity vectors on geometric deviations.
Access status: Open Access ,
Surfacing of cutting edges for clay cutting
(Wydawnictwa AGH, 2011) Hermann, Jörg; Kraemer, Hubertus; Stenzel, Peter; Sevim, Agah Meric
Wear or abrasion in lignite opencast mining have a complex appearance and are caused by excavated material. In order to minimize costs for the mining company a project for optimizing geometries and alloys of clay cutting edges has been started by responsibles of CORODUR Fulldraht GmbH - Das Original. In this article it is described how an optimisation is setted up - from updated geometries for both, left and right cutting edges, over new alloy compositions to development of welding technologies. Moreover there has been checked the feasibility of PTA-welding and Open Arc welding and also the welding sequence which had to be feasible. Mechanisation by robots resulted in better weldbead appearance, lower costs and an in general more stable quality of welded clay cutting edges. At the end of the study including insitu wear tests it has been showed that the service life in the test period has doubled, compared with the former technology. Beside this it was possible to decrease the energy consumption in operation of the excavator by the new geometries for the cutting edges.