- #1
Rafa
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The process of carburization works via the implantation of carbon atoms into the surface layers of a metal. As metals are made up of atoms bound tightly into a metallic crystalline lattice, the implanted carbon atoms force their way into the crystal structure.
The carburization is produce for difusion of C in the Steel. I read that temperature for carburization are around 900ºC.
The difusion of C depends of Fick'a law. For:
bcc Fe , the difusion of C is D=220x10^-6*exp(122000/RT)
fcc Fe , the difusion of C is D=20x10^-6*exp(142000/RT)
Then difusion in austenitic steel (fcc Fe) is lower than ferritic steel (bcc Fe)
¿Why do it use a higher temperature (900ºC) if the diffusivity in fcc-fe is lower than in bcc-fe?
The carburization is produce for difusion of C in the Steel. I read that temperature for carburization are around 900ºC.
The difusion of C depends of Fick'a law. For:
bcc Fe , the difusion of C is D=220x10^-6*exp(122000/RT)
fcc Fe , the difusion of C is D=20x10^-6*exp(142000/RT)
Then difusion in austenitic steel (fcc Fe) is lower than ferritic steel (bcc Fe)
¿Why do it use a higher temperature (900ºC) if the diffusivity in fcc-fe is lower than in bcc-fe?