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· In the martempering process
shown, the sample is cooled rapidly below the nose of the thermodynamic transformation
processes taking austenite
to pearlite.
· Before
reaching the martensite
start temperature, the material
is held at a constant temperature to remove stresses introduced by the rapid
cooling
· The tempering process
is terminated before the bainite
start time is reached and the sample quenched
through the martensite formation zone.
· The final microstructure is martensitic, but with lower stresses
than would result if the initial cooling trajectory had been continued through
the martensite formation zone.
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