Je toplotna obdelava, s katero jeklo močno utrdimo, pri tem pa nastopi struktura imenovana martenzit. Ta struktura je izredno trda, vendar pa z zelo majhno žilavostjo in visokimi notranjimi napetostmi. Izdelek moramo najprej po celotnem preseku enakomerno segreti – paziti moramo, da se izdelek ne pregreje. Nato sledi hitro ohlajanje s področja kalilne temperature na temperaturo okolice – nadkritična hitrost ohlajanja. Po kaljenju nastopijo zelo visoke napetosti v izdelku, ki jih nekoliko omilimo z naknadnim žarjenjem. Po kaljenju sledi popuščanje jekla za povečanje žilavosti oz. zmanjšanja trdote in trdnosti jekla.
-Lažja avtomatizacija postopka
-Lažje reguliranje kalilne globine
-Večje hitrosti
-Manjše deformacije izdelkov
do Φ200 X 1500mm
do Φ1000 X 500mm
do Φ200 X 1500mm
do Φ1000 X 500mm
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