Results of AEB-L coupon test...not conclusive

Are you using the forced air when you plate quench?
 
I've never done one without subzero. I'll do a test today and report the results.
 
Willie71 said:
I've never done one without subzero. I'll do a test today and report the results.
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Thank you sir - I (and others I'm sure) will be very interested in your results. With proper dry ice use, there is no way to test Rc direct from quench plates. It takes several minutes (hours??) for full hardness in AEB-L and other alloys. Proper treatment should be direct from quench plates into dry ice slurry so the quench is a continuous process.

Ken H>
 
Ken H> said:
Thank you sir - I (and others I'm sure) will be very interested in your results. With proper dry ice use, there is no way to test Rc direct from quench plates. It takes several minutes (hours??) for full hardness in AEB-L and other alloys. Proper treatment should be direct from quench plates into dry ice slurry so the quench is a continuous process.

Ken H>
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I find my results pretty consistent. I wasn't using the refined heat treat Devin T uses, just the AKS process, and I come out spot on at Rc62 after the second temper every time, give or take 0.5. The most consistent steel I use is S35VN. Dead on Rc60 every single time.
 
I got my batch of AEB-L from Aldo and had it heat treated by Peters however they were doing it back in 2013-14. I asked for 60Rc plus and I durn sure got it if hand sanding is any indication.:D
 
I think that it happens pretty quick with AEB-L
Ken H> said:
Thank you sir - I (and others I'm sure) will be very interested in your results. With proper dry ice use, there is no way to test Rc direct from quench plates. It takes several minutes (hours??) for full hardness in AEB-L and other alloys. Proper treatment should be direct from quench plates into dry ice slurry so the quench is a continuous process.

Ken H>
Click to expand...
 
Tested the coupon.

1st, the process: 1575 for 10 min, ramp up to 1995 at max speed, soak for 5 min, quench in aluminum plates. I stuck it in the freezer for a couple hours. Ground off decarb (very little present) and:

Rc62 at multiple points across the coupon. One Rc63, and one Rc60 with 10 readings. Note this is 0.070" stock, so that might have some bearing compared to thicker stock.
 
Willie, Thanks for the info - I'll try that with a test coupon tomorrow. Except for the soak at 1575ºF (Sandvik says no point), that's just how I do Sandvik steels and always had good luck with them. I'll follow YOUR test and hope for the same results using .070" AEB-L test coupon.

Ken H>
 
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