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#1
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Heat Treat HELP!!
I'm starting to gather equipment to transition into doing my own heat treating.
Can someone please tell me the best place to buy a Dewar? Also what is a good liter size, I'm finding them from 3 to 30 liters. Anything else I'm may not know you can think of please enlighten me. thank you Bigjohn |
#2
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Most often a Dewar is used in livestock operations.... Here's a listing for one on facebook:
https://www.facebook.com/groups/knif...01715072067611 Personally, mine holds 54lbs of liquid. The tough part is finding/having a local source to fill your Dewar. You can expect liguid Nitrogen to last only a week or two in a Dewar, unless you take steps to make it last longer. I built a plywood "box" that my dewar fits inside. The box is lined with 2" of insulation. I place the filled dewar inside, and fill all the airspace surrounding it with vermiculite, and place a piece of R30 fiberglass insulation on top. Depending on the outside temps, a filled tank will last approx. a month. If you've not already checked into it, be prepared..... a dewar is expensive, and filling/maintaining it isn't cheap either! __________________ WWW.CAFFREYKNIVES.NET Caffreyknives@gmail.com "Every CHOICE has a CONSEQUENCE, and all your CONSEQUENCES are a result of your CHOICES." Last edited by Ed Caffrey; 08-04-2017 at 10:32 AM. |
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buy, heat, heat treat, heat treating, make |
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