Application and practical use of Iron-Iron Carbide digaram.

[bg1986]

Guys,

I studied Iron-IronCarbide diagram in my mechanical engineering bachelors, but never got to work with it my career.

I like to know the practical applications of the Iron-IronCarbide diagram in job, and places they use it.

I really Appreciate your help in explaining me the details or directing me to the resource.

Thanks,
Bhargav Gajji.

 

[Lyrl]

I work at a heat treater, and the diagram is an excellent reference when explaining to employees and customers what we're doing to the parts we process. We have multiple posters hung throughout the shop, and this has been true at all three heat treaters I have worked for. I also had an internship at a steel foundry, and they used the posters in a similar way (to educate employees and customers).

In practice, the steels we process are alloys, and the alloying elements affect the exact shape of the diagram. This means the "plain" diagram can't be used in determining processes - we rely on publications like the ASM Heat Treater's Guide for that. It's really mainly for instructional purposes.

 

[bg1986]

Hi Lyrl,

Appreciate your time for answering the question, Can you elaborate on " When explaining to employee.... to the parts we process".

Do you guys use the iron carbon diagram phases, see during the operation, whether the micro-structure confirms to the designated microstructure in the Fe-FeC diagram?

Thanks,
Bhargav Gajji.

 

[arunmrao]

bg1986,
Your question is not clear to me. How do you want to use the information, for selection of a steel or a process or conduct a structure-property correlation analysis. The benefits are immense, like the Ellingham Diagram for a process metallurgist.




"Even,if you are a minority of one, truth is the truth."

Mahatma Gandhi.

 

[bg1986]

Hi Arun,

My question, is how exactly the phase diagram is used in a process and where exactly it is used.

To elaborate, i like to understand, why do we plot the phase diagram for Fe-FeC?

Is it to understand just the phase of the composition, under varying temperature when the mixture changes from solid to liquid ( and intermediate solid phases), or do we use the Fe-FeC diagram for designing a process of the melting the mixture. etc.

Thanks,
Bhargav Gajji.

 

[mrfailure]

bg1986,

First, you are not referring to the diagram correctly. It is the iron-carbon diagram, NOT iron-iron carbide. The diagram you attached shows how steel (and, for high C, cast iron) responds and changes structure during heating and is one of many tools used by heat treaters. You should obtain a copy of the Metals Handbook Desk Edition (a basic reference anybody who needs to understand metallurgy should have) and look in the chapter titled "Structure/Property Relationships in Irons and Steels", which will give you a much better understanding than we can give you in this forum.

 

[bg1986]

I Appreciate all for your answers.

 

[DeleteriousPhases]

Yep, phase changes by carbon % and temperature.

I'd recommend Welding Metallurgy Volume 1 by Linnert as well, gets into the nuts and bolts of the applications with welding, steel production, etc. and has references, if you're interested.