Video clips of the Jominy test procedure
Video clip 1: Transferring the sample from furnace to quenching machine
specimen is suspended from a wire and held in a furnace to austenitise the microstructure at around 900°C. It is then carefully
and quickly moved to the quenching machine and positioned above a water jet.The water jet is started and sprayed onto the
bottom of the specimen until the specimen is cool.
Video clip 2: Quenching the sample
the water jet sprays onto the end of the hot, glowing specimen, a cold dark region spreads up the specimen. The cold region
has transformed from austenite to a mixture of martensite, ferrite and pearlite. The proportions of the phases at any position
depends on the cooling rate, with more martensite formed where the cooling rate is fastest. Ferrite and pearlite are formed
where the cooling rate is slower.
Video clip 3: Jominy end quench test
This alternative longer video clip (contributed by Oxford Brookes University) shows both the transfer of the sample from furnace to Jominy machine, and the jet spraying one end of the sample.