Decarburization at heat treated material - 1.8507
Treatment : quenched and tempered
Magnification : 100 : 1
Etching medium : 3 % alcoholic nitric acid
Sampling / Specification : transverse
Testing result :
stronger surface decarburization 0,26 mm deep
Treatment : quenched and tempered
Magnification : 200 : 1
Etching medium : 3 % alcoholic nitric acid
Sampling / Specification : transverse
Testing result :
tempered upper bainite and some ferrite
in the stronger area of the decarburization