The effect of pre- and post-heat treatment on hardness and residual stress by laser metal deposition process of tungsten carbide (MetcoClad 52052) cladding on a CK45 substrate

Abstract

During laser metal deposition (LMD), large temperature gradient occurs due to the process. These fast changing of temperature leads to high residual stresses, which in turn causes the formation of cracks and deformation. These residual stresses can be reduced with the heat treatments. In this way, the quality of the deposition can be extremely improved. This investigation shows the results of the pre and post heat treatment in terms of hardness and residual stresses in LMD process of mix powder tungsten carbide (MetcoClad 52052) cladding on a CK45 substrate . An improvement of the quality of deposition and surface integrity can be observed.