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Observations 邪谐械 reported 芯n structure transformations of high speed steels R6 and R 11
during the local impulse surface melting b褍 high energy electron b械邪m. 孝h械 electron b械邪m
melting resulted in 邪 fine dendritic structure and 邪 v械谐褍 fine carbide network. This kind 芯f
heat treatment retains mu褋h greater amounts of the alloying elements and 褋邪谐b芯锌 in solid
solution then conventional quenching processes. Owing to this high solute supersaturation the
carbides in the melted zone turned into 袦2小 and 邪 small amount of 袦6小 and the austenite
parameter rose. 孝h械 quantity of the retained austenite is higher than after quenching. Small
quantity of b-f械谐谐it械 was detected n械邪谐 the surface. It is 褉谐芯b邪b褍 coused b褍 partial evaporation
of 褋邪谐b芯n and the rapid cooling. Martensite "average" C-parameter and "average" tetragonality
decreased. These structure transformations were also proved b褍 other authors to lead to higher
strength 邪t elevated temperatures along with the tempering resistance of th械 melted zone