Ribbon Burner / Temp Control

Judcargile

Judcargile

Joined
Jul 3, 2022
Messages
145
If intending to use gas forge to HT stainless and particularly AEBL, my monitored range set @ 1975, show 1960-1990 and every few cycles gets into the mid 50s.
I would love to know if my true temp will have any noticeable effect on the end result.
Do I need to tighten up temp control loop before I attempt to HT AEBL?
 
Are you going to use a cold treatment? If you are not I would drop target down to where the low is 1920 and see what happens.

Edit: after looking at some coupon numbers I would probaly drop the low on your swing to 1875 if you are not going to do cold treatment.
 
I am going to cryo.

I am also leaning to trying out a batch.

Does a longer soak time hurt anything? I can only plate quench 1 at a time.
 
Judcargile said:
I am going to cryo.

I am also leaning to trying out a batch.

Does a longer soak time hurt anything? I can only plate quench 1 at a time.
Click to expand...
What hardness are you looking to get?

Longer soak time by minutes is not going to cause harm and probaly the least of your worries.
 
Are you using a muffler pipe? If not, putting the TC tip inside the muffler pipe where the blade should be. With a ±15°F temp swing is pretty big. If you could close it up a bit (and a muffler tube might help) to perhaps ±5°F I'd think you'd be in pretty good shape. With a ±15°F temp swing I'd think perhaps the Rc results would vary a bit from blade to blade. Using LN I'd think you would be able to get 61Rc after tempering by varying the tempering temp to achieve the 61 Rc.

The idea would be to try one blade at a time rather than a batch until the process has been nailed down. Perhaps use coupons rather than a blade to see how much the Rc varies.
 
The temp controller is trying to keep my solenoid valve in one piece. The cycle overall is pretty fast.

I have no communicator, but, I may be looking at my first semi smart device. I say that bcause it learns via fuzzy logic !!!

If you say tighten to 5, then the PID function should land us on it. Although, that may end at a bank of valves. The distribution sounds fun.

Muffler Pipe? Is this having square tubing sitting in the forge to make a smaller and more controlled atmosphere? Try to compensate instead of melting solenoids?
 
Note I did say ±5°F which is a 5 degree swing on either side of setpoint for a 10 degree swing.

Yes, the muffler pipe (square or round) is the pipe sitting inside the forge so the flame doesn't hit directly on the blade. The tip of TC should extend just inside the muffler pipe.

Good luck and let us know how it turns out.
 
Just semantics, but the tube/pipe in a forge is called a MUFFLE (a car has a muffler)


muf·fle
[ˈməf(ə)l]
Noun
  1. a receptacle in a furnace or kiln in which things can be heated without contact with combustion products:
    "a muffle furnace"
 
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