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Fakulteta za strojništvo, Ljubljana (FSLJ)
  • Laser repair welding of cold work tool steels
    Pleterski, Matej ...
    Repair welding of cold work tool steels with conventional methods is very difficult due to cracking during remelting or cladding and is generally performed with preheating. The preheating can be ... avoided using laser technology with the appropriate selection of laser parameters, including laser pulse shape. The influence of various pulse shapes on cladding with the pulsed Nd:YAG laser was investigated. Repair welding tests were carried out on AISI D2 tool steel samples. Afterwards, micro-hardness, X-ray diffraction (XRD) analysis and investigations of defects with optical and scanning electron microscopy (SEM) were carried out. The test results suggest that it is possible to obtain sound welds with the right selection of welding parameters and appropriate pulse shape. The sliding wear tests proved that the hardness alone is not a decisive criterion for wear resistance prediction. All laser claddings namely indicate better wear resistance at lower loads compared to the base material, due to great deformation hardening of the present retained austenite.
    Vir: Conference proceedings (Str. 247-254)
    Vrsta gradiva - prispevek na konferenci
    Leto - 2011
    Jezik - angleški
    COBISS.SI-ID - 12011291

vir: Conference proceedings (Str. 247-254)

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