HeatTreatment the process of changing the property of material by heating &
cooling process, purpose of heat treatment. relieve internal stress improve
machinability & mechanical properties like ductility malleability hardness
toughness & improve grain size , existing properties of materials
---heating---existing properties wiped out & boild is ready to gain new
structure-- cooling,moderate cooling (normalizing process ),-very slow
cooling(annealing process),-very fast cooling (quenching,hardening),,,,, surface
hardening--carburizing ,cyniding,nitring, induction hardening,age
hardening,spberadize hardening,flame hardening,tempering
https://youtu.be/HRZpwNpopEg
https://youtu.be/K2mpVqY7nRQ
