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The effect of laser heat treatment (LHT) of selected steel grades after various chemical heat-treatments (CHT) on the structure and microhardness has been investigated. The specimens were subjected to following CHTs: boronizing (45), silico-boronizing (50HS) and chromizing (NC6). The LHT has been carried out by means of CO2 laser beam of maximum output of 6 kW and applied power 1200-2000 W at scanning...
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