Some NEW Phenomena Discovered During Immersion of STEEL Parts Into Liquid Quenchants

SOME NEW PHENOMENA DISCOVERED DURING IMMERSION OF STEEL PARTS INTO LIQUID QUENCHANTS

 

N.I.KOBASKO, SH.E.GUSEYNOV

 

1. It has been established by experiment that during immersion of metallic probes into liquid the shock boiling exists which affect the value of the first critical heat flux density. As a result, the classical correlation q_cr1 = 5q_cr2   may differ significantly from the results discovered early.
2. During  shock boiling the first critical heat flux density increases that eliminates the process of film boiling.
3. When film boiling is absent, so called self – regulated themal process takes place.
4. During the self – regulated themal process surface temperature is maintained  at the level of boiling point.
5. For such condition of quenching the mathemetical model was formulated.
6. Results of investigation were used for prediction of micro-structure and hardness at the core of steel parts of any configuration.