ANNEALING SECOND TYPE

This is a process otherwise called recrystallisation as a result of this a phase transformation take place by heating the steel material to temperature point above Ac3 or Ac1 and slow cooling.temp. for eutectode steel is 750 to 760 Deg C for hyper eutectoid carbon steel 770 to 790 Deg C hyper eutectoid alloy steel 770 to 820 Deg C and a cooling of 30 to 50DegC /Hr

This is shall be done in bogie hearth,, Pit type, Bell type FurnacesClick to edit text