Heat Treatment and Carbide Removal

Put the gear on an indexing plate and use a grinder to remove the carbide. I mean a proper grinding machine not a hand held angle grinder.

thanks for reply , can we remove it by further rework inside the gas carburizing furnace .

We are really in danger of getting all tripped up over semantics here.

Instead of talking about "carbide" whatever it is that you might mean when you use this term< how qabout we figure out what the situation is?

I'm thinking that someone carburized gears by mistake, and now you want to know how to recover the parts that were so treated.

Once we know the situation, I;m sure that a number of folks will be able to contribute.

milo

HUhhhhh?

What do you mean 'Carbide which comes at tip of gears after heat treatment?'

What is material?

What is thermal cycle?

Presuming steel?

If you are carburizing, why would you want to remove?

If you are incorrectly using the word 'carbide' to mean 'decarb' or 'scale' then The use of precision grinding to remove these is legitimate advice.

But You absolutely have me puzzled by what the heck you seem to mean by carbide, and without understanding, i would merely put you in danger by providing an answer that is very likely inappropriate.

What do you mean by carbide?

It is critical to everyones safety that we agree on vocabulary if we are to provide valid engineering assistance, and I'll be darned if I can match what I think you are talking about to my professional knowledge and experience of metallurgy.

milo

Yes, please let me know if you ever get an answer. The question seems to imply that heat treatment somehow reduces the carbide content of the resulting steel by bringing it to the surface, so this would certainly be an important problem were it to occur.

james h waters phd

thanks for ur reply

carbide(cementite) an increase in the amount of carbide indicates carburization, and decrease indicates decarb.A fully annealed sample is almost best for determining depth of carburization or decarb by observing carbide variations. size and frequency of carbide particles can be measured in order to estimate more accurately the percentage in the microstructure. extreme carburization can result in massive carbide at the surface.

sir i don't want to puzzle u, i am new in heattreatment unit ,i shall have to gain concepts . i thing u could help me.

Amount of carborization or de-carborization is controlled by furnace atmosphere.