LABORATORY ANALYSIS OF HARDFACING MATERIAL APPLIED BY PLASMA AND TIG WELDING

  • 1Technical University in Zvolen, Faculty of Technology, Zvolen, SK
  • 2Slovak Academy of Sciences Kosice, Institute of Materials Research, Kosice, SK

Abstract

There is not so much research on the issue of the wear of forestry tools as on tools used in agriculture, mining or construction. However, in a heterogeneous environment, they are subject to abrasive and shock loads. The large number (48 pieces) of tools used at the same time, based on base machine adapters, their rapid wear and the high price of a new tool (approx. 70 Eur), is the reason why it is necessary to deal with this issue. One solution is to apply hardening materials to exposed parts of the tools. These could prevent rapid decommissioning due to the loss of functionality of the tool due to their structure, more resistant to adverse working environments. Methods of applying such a deposit are different. From classical welding methods for example TIG method, up to unconventional, where also plasma welding belongs. The aim of this paper is to present partial results of laboratory experiments of plasma welding and TIG welding with HR MAG welding wire on the tool base material, 16MnCr5 steel. Specifically, the hardness as well as the hardness of the hard-facing material to abrasive wear by the GOST method were examined. Subsequent evaluation of the surface after this test as well as the microstructure itself can give us information on the suitability of the selected material for practical application in forestry.

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