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Browsing by Subject "steel casting"

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    Item type:Article, 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.