1 The TTT diagram for a 077 C eutectoid steel is given expla

1: The TTT diagram for a 0.77% C eutectoid steel is given, explain each heat treatment process a) to form 40% ferrite and 60% Pearlite. b) to form more than 90% martenisite c) to form 50% Bainite 50% martensite. a) 6soc\" in y not possible I Eutectoid temperature b Soo c in 1 sec C) sso in lo sec Boo Tune (s)

Solution

To get 40% Ferrite and 60% pearlite: Cool to 650 degree celcius in 10 seconds

To get more than 90% martensite, when cooled to 100 degree celcius in less than 40 seconds

To get more than 50% martensite and 50% bainite, cool to 166 degree celsius in 1000 seconds