Revolutionary HT oven design.

JTknives

JTknives

Joined
Jun 11, 2006
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As i was designing my new HT oven an idea hit me. why dont i add another chamber on top of my oven for tampering. so the top bricks of the HT oven will be the floor of tempering oven. then get a pic that can control 2 zones and your set. why your soaking the blade the Tempering part is coming up to temp. it would get help from the floor heat from the HT. that way i could go strate from quench to percise tempering. it might be better to use 2 pids one simple for tempering and one fancy. what do you think
 
I think that this idea also works great in case you want to bake some pizza while heat treating. :D
 
o ya some hot pockets, yum. it does not look to be that much more expensive. i would probabley splurge and get a good pid for both so the heat treat can be programed and left. now if onley i had a robotic tong that could take the blade out, quench and put in for tempering :D. o well a good HT oven is better then nothing
 
Jt, Just figure out how big you want your chamber and gather up enough soft bricks to do that then enough Kaowool for a layer on the outside the bricks. Find or make a box to hold that. You can use some light angle and plate and a butt load of small bolts it you can't weld. Get a pid,SSR and thermocouple off Aubriens for under $100 and some Kanthol wire and away you go. It isn't hard to make a good oven. Keep your eyes open at your secret store for a welding rod oven. One of those and another pid, SSR and thermocouple and you have a great tempering oven. The tempering oven uses so much less power and the time is so much longer. Don't hook them together. No need
Make it harder to work on either inn the future. A big toster oven redone with a pid would work great. Jim
 
There's nothing really revolutionary about recycling heat from your heat treat cycle to temper. A lot of people wait till their oven cools into the tempering range and then use it to temper. Some folks let it cool completely and then run it back up. If you're letting heat escape into your second chamber for preparing the tempering cycle, the oven is going to take more energy to get to temp and/or longer.

You won't really save any time doing this, because you could just as easily pre-heat a toaster oven. You could control it with a PID as suggested above, that might be a worthwhile improvement for 60 or 70 bucks.

In conclusion, build the two chamber oven and tell everyone how it works.
 
ib2v4u, dont the welding rod ovens onley have a max temp of 300. but say someone ;) finds one of the porable vertical ovens could it still be used for a tempering oven or would it make a sweet quench tank.
 
JT, from the manufacturing equipment that I have designed and repaired thru the years I think that you will be better served making a separate oven. You will have an odd temperature gradient with the radiant heat coming up thru the bottom of the tempering chamber using your plan. Your second PID will be trying to adjust the temperature by switching current to the tempering oven heater, but will have no control over the heat coming from the lower chamber.

YMMV,

Steve
 
I think that if you where to remove the stock temp control and go with a pid and thermocouple a welding oven would got to 400-500 no problem. I have a element from a big rod oven and a extra pid and thermo couple so I am going to find out. Jim
 
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