Excessive Grain

scott kozub

scott kozub

Joined
Jan 1, 2018
Messages
861
I heat treated a Blade made of AEB-L and realized that it was way overheated. Really big grain. I tried sharpening it and it's OK but just wont take a fine edge.

Is the blade fubar'd or can I anneal it to reset the grain followed but a second eat treat. If so, what procedure do I follow. I found one that said 1200 degrees for 4 hours but another tread I found said 12 hours which seems excessive.

I'm just learning so if there is something that I can try, I'd like to give it a go.
 
It would probably be of benefit to you and us if you explained what you did to heat treat it first. AEB-L needs a dry ice/liquid nitrogen quench or it won't fully harden. Did you do that?
 
Sub-critical annealing does not refine the grain by itself, whether 4 hrs or 12 hrs.

Excessive grain growth will be difficult to fix without forging and thermo cycling.

Hoss
 
Yeah I don’t know how to fix AEBL but I know the manufactures say you basically get one shot. I have reheat treated AEBL but not because of grain issues.
 
I did dry ice it. After I did the heat treat I ran some test and it was running hot.

Oh well, I'll just start over. It was just a test anyways. Thanks guys
 
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