As per my understanding,TTT (C-Curve)or CCT won't give any idea on my query.Both diagrams discussing about the phase changes occurs on cooling above upper transformation temperature.So,CCT or TTT gives information on austenite decomposition.For a hypothetical manner we can say above lower critical temperature on hypo-eutectoid steel as it contains partial gamma iron(austenite) and alpha iron(ferrite).
Regards,
Limesh
On Mon, Aug 22, 2011 at 4:12 PM, Biplab Pal <biplab.mech@googlemail.com> wrote:
You should go through TTT diagram.
On Sun, Aug 21, 2011 at 7:48 PM, limesh M <limesh78@gmail.com> wrote:
--Dear All,
Material : Carbon steels in between 0.008% carbon and 6.67 % carbon.
1.Is there any metallurgical changes(phase change) will occur other than pearlite,if I heat rapidly uncontrolled heating)low carbon steel just below or equal to lower critical temperature(723 C) as per iron-carbon equilibrium diagram?
2.1.Is there any metallurgical changes(phase change) will occur other than pearlite,if I cool rapidly (uncontrolled cooling, no quenching by any kind of liquid medium)low carbon steel from just below or equal to lower critical temperature(723 C) as per iron-carbon equilibrium diagram?
Regards,
Limesh
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Thanks & RegardsBiplab Pal
Industrial Services, Inspection Engineer.
SGS India Pvt. Ltd.
Kolkata BranchE-mail: biplab.mech@gmail.com
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