Where to find a TTT diagram 4

[leizhou]

Can someone guide me to find a TTT/CCT diagram of a 0.12%C/0.25%Si/1.4Mn Steel. (ASTM A694 F65)

Thanks

 

[0707]

It will not easy to find that diagram, maybe a steel maker would help you. However the links bellow can help you to make some extrapolations.

http://www.matter.org.uk/steelmatter/metallurgy/7_1_2.html

http://info.lu.farmingdale.edu/depts/met/met205/tttdiagram.html

Luis Marques

 

[CoryPad]

Atlas of Time-Temperature Diagrams for Irons and Steels

available from ASM International:

http://www.asminternational.org

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

 

[hk1956]

On the website

http://www.kaker.com

is Database of Steel Transformation Diagrams, 3764 diagrams. Currently is website down and will be active in two days.

Henrik

 

[hk1956]

Webiste

http://www.kaker.com

is now active, please see the
link

http://www.kaker.com/std/std.html.

Henrik

 

[CoryPad]

Henrik,

That is a nice database.

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

 

[dbooker630]

Very nice database, Henrik. A star for you.

 

[leizhou]

Thanks very much for your advise I have got something similar. However, the diagram did not gave any detail of the phases. How to understand it?

Thanks

 

[Metalmeister]

I guess that is why companies hire metallurgists.

 

[dbooker630]

Generally a CCT will show general structure ranges and I see that this one does not label them. It does not appear that any of the curves goes through a martensitic transition. The faster curves may be bainite+pearlite+ferrite, the slower ones pearlite+ferrite. The circled numbers are the final hardness but also should include a scale as to whether they are Vickers or Brinell. Not the best presentation of a CCT.

 

[CoryPad]

It is obviously a carburizing alloy, which makes the CCT somewhat moot.

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.