Friday 8 May 2015

Q:- For the structure termed martensitic to form in a c-mn steel it must first be heated to just below a critical temperature and rapidly cooled

  • Just below its lower critical temperature and rapidly cooled 
  • A maximum temperature of 550*C then rapidly cooled 
  • Above its upper critical temperature and slowly furnace cooled 
  • A full transformation to austenite then rapidly cooled

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