The test series should convey knowledge about the grain size
and its growth into dependence of the quenching temperature. The examined material
was 55Cr3.
Initial condition : hot rolled 15,00 mm , untreated
Heat treatment : laboratory furnace (volume 5 liter) ; soaking
of the samples in 5 minutes
Hardening : different temperatures , holding time 30 minutes
, quenching in oil
Tempering : 450° C , holding time 60 minutes , cooling at
air