Carburising of A410

[harsuda]

What is the cycle to be followed for carburising of A410 to get case depth of 1.0-1.2mm case depth.

 

[TVP]

I am not familar with the designation A410. Can you provide more information on the chemical composition of this grade?

 

[harsuda]

Hi TVP,

When I said A410 it is AISI 410. The chemical composition is
C: 0.15 Max,
Mn: 0.5 - 1.0 Max.
Si: 0.5-1.0
Cr: 11.5-13.5
S: 0.03Max.
P: 0.04Max.

 

[redpicker]

This can present problems.
The high chromium content raises the temperature at which austenite forms and lowers the temperature at which delta-ferrite forms. So, to get the material austenitc (almost an necessity), you will have to be 1775-1820F. The austenite will staurate and form Chromium Carbides above 0.50% C. Of course, you will have problems with retained austenite (not to mention cracking) if you tried to quench it.

If that wasn't enough problems, most carburizing atmospheres, while reducing to iron, are oxidizing to chromium and chromium carbide. So, the chormium oxide layer on the surface will impede carburization and any chromium carbides that form near the surface will begin to oxidize, causing more problems.

I won't say it can't be done, but I will say that, as far as I know, it isn't done on a commercial basis. Unless you want to start a research project, it would be best to try and find another solution.

rp

 

[Yallapragada1022]

I am not sure why you need such a deep case depth on this material. You may want look at Nitriding the steel to much shallower depths as an option.

I hope this helps.