Carbon Content decrease after Cold-forging process?

[soo33y]

Hi guys,

I've come across an abnormality at work with regards to Carbon Content.

The raw material used was 1010 CHQ which should have a carbon content of 0.08 - 0.13.

However after going through a cold-forging process, we tested the final product and found that the Carbon Content decreased to 0.041.

How did this happen? Is it possible? Can someone explain?

Really stumped at this stage.

Cheers,
Daniel.

 

[Enthalpy]

No explanation. That sounds astounding to me.

Maybe there was some segregation and the tiny place where you measured was chosen unluckily?

 

[pukb]

segregation may lead to C atoms migrating to surface of the material.
But this should not be a problem unless the material is heated for a long time.
If heated for a long time and tested after heating inside the material, the result of yours seems to be acceptable.