Quench - The rapid cooling of steel from a temperature above the transformation temperature. This results in hardening of the steel. Temper - Reheating of steel to a temperature below the transformation temperature following the quenching of steel. This usually lowers the hardness and strength and increases the toughness of the steel.

Quench Temprare
Quenched and tempered steel Acciaio bonificato
Quenching Raffreddamento brusco, tempra spegnimento
Quenching and tempering Bonifica
Quenching with subsequent drawing Tempra seguita da rinvenimento
Quenched and subsequentli tempered steel Acciaio temprato e successivamente rinvenuto (bonificato)