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Faculty of Mechanical Engineering, Lj. (FSLJ)
  • Tungsten heavy alloy as a filler metal for repair welding of dies for high pressure die casting
    Skumavc, Andrej ...
    This paper presents the preliminary test of tungsten heavy alloy as a filler metal for repair welding of high pressure die casting dies. H13 grade hot work tool steel was used as a base material. ... Multipass gas tungsten arc welding was used to fill a single-V butt joint with tungsten heavy alloy in the form of a welding rod. The microstructure of the weld was examined using scanning electron microscopy and optical microscopy. It was found that tungsten grains are not dissolved completely during welding and areas of fine eutectic were formed during solidification of the weld. The hardness of the weld was measured in three courses across the weld and increased in the heat affected zone while the weld hardness was below 380 HV0.3. Charpy V-notched samples were prepared from the weld. The high content of tungsten grains distributed in the nickeliron weld matrix resulted in low impact toughness of 5.1 J. Face bend testing of the weld was conducted in order to study weld ductility.
    Source: International journal of materials research : Zeitschrift für Metallkunde. - ISSN 1862-5282 (Vol. 104, no. 11, Nov. 2013, 1143-1150)
    Type of material - article, component part
    Publish date - 2013
    Language - english
    COBISS.SI-ID - 13223451
    DOI

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