It’s not just about simple hardening and tempering. The text dives deep into:
"Tratamientos térmicos de los aceros" by José Apraiz Barreiro is a seminal Spanish engineering text covering essential metallurgical processes like annealing, quenching, and tempering. Written by a noted industrial expert, it remains a definitive resource for understanding the structural transformation of steel. Access a copy of the text on It’s not just about simple hardening and tempering
The steel is heated and then rapidly cooled in water, oil, or air. Quenching increases hardness and strength but reduces ductility. It’s not just about simple hardening and tempering