Bad heat treated structure - 1.4718
Treatment : quenched and tempered
Magnification : 100 : 1
Etching medium : 3 % alcoholic nitric acid
Sampling / Specification : transverse
Testing result :
bad heat treated - underhardened :
mixture of heat treated structure , sorbite
and annealing structure
Treatment : quenched and tempered
Magnification : 100 : 1
Etching medium : 3 % alcoholic nitric acid
Sampling / Specification : transverse
Testing result :
faultless hardened :
ferrite free heat treated structure