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Quench Tank Ideas

Discussion in 'Forges, Ovens, Kilns, & Salt Pots' started by dancom, Oct 19, 2015.

  1. dancom

    dancom Dust Maker Best Shop Tool

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    I am looking for some ideas for a quench tank. I see some people are using vertical setups (like an upright cylinder) and some are horizontal with adjustable depth regulators and so on.

    What are you using? Do you have warming system?

    Thanks in advance,

    Dan
     
  2. jonliss

    jonliss Active Member

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    I am using a similar quench tank as yours, but down in Vegas I visited a guy who uses a deep fryer as a quench tank.
     
  3. Putterer

    Putterer New Member

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    Hey Dan.

    I just picked up a large ammo can this weekend from Princess Auto for $40. Sometimes they come on sale, but I just wanted to get the ball rolling, so I grabbed it. The can measures 18" long, 10" tall and 6" wide. This should be large enough for anything I have planned at this point in time. It also has a metal lid, which works well if I set the tank of oil on fire. :)

    I was going to post a photo, but just realized that I have to set up a photo sharing account somewhere. I guess that's next on the list.
     
  4. Putterer

    Putterer New Member

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    OK, here's my first attempt at posting a picture. Hope it works.
    Here is the ammo can quench tank. I forgot to mention that I have an old portable hot plate/griddle that I think will work well to preheat the oil.

    [​IMG]
     
  5. Brad

    Brad Active Member

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    I had a long tank built. Mine is horizontal and I use parks 50. I also have a old roast pan filled with mineral oil to do edge quenching.
     
  6. dancom

    dancom Dust Maker Best Shop Tool

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    Thanks guys.

    Liking the the ammo box idea. Would there be any seams that could leak?
    I was thinking about putting an immersion heater and thermocouple in it. I could fit those in the side and seal them up with a neoprene or silicone.
    I am currently using the old roasting pan thing. On the weekend, I also spotted a 30 pound LPG tank at the dump. That may work for a vertical tank.

    Dan
     
  7. Brad

    Brad Active Member

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    You could weld feet on the side of the tank and make a horizontal tank from the LPG tank. With a little careful cutting you could make a hinged lid.
     
  8. Putterer

    Putterer New Member

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    Hey Dan.

    There is a welded bottom to the ammo can. I've seen these used in a number of YouTube vids by knife makers and no one mentioned leaks. The lid comes with a waterproof rubber seal, and considering that ammo and water don't mix well, I think the cans are designed to be waterproof. Having said that, I will be testing out the can with water, just to make sure that there are no leaks before pouring in a bunch of oil.
     
    Grizz Axxemann likes this.
  9. BigUglyMan

    BigUglyMan Active Member

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    I've always used a 9"x13" cake pan and set it on a hot plate to warm the oil. For a vertical tank a person could take a fire extinguisher and cut off the top (if you do this carefully you can reuse the top as either a lid or you can make it into a funnel), Then wrap a battery blanket around the tank and secure with zip-ties to warm the tank and oil.
     
  10. dancom

    dancom Dust Maker Best Shop Tool

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    I like the idea of having flat walls as I have a thermocouple and immersion heater to install. This with a temperature controller and 90 degree C cut-out I can make a complete setup. Hmmm, did someone say fire suppression system as well?
     
    snailgixxer likes this.
  11. John Noon

    John Noon Well-Known Member

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    If the gasket is in good shape the ammo cans are typically waterproof even when submerged in the back of a vehicle. Use a older oven rack and bend into a strainer for removing anything that may get dropped into the can.
     
    dancom likes this.
  12. Ryan Ladurantaye

    Ryan Ladurantaye Active Member

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    I've got a large metal tube I use as well as an ammo can. To heat it up I just use some nice hot rebar while I'm getting things set up to heat treat.
     
  13. dancom

    dancom Dust Maker Best Shop Tool

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    I hear ya Ryan. I was using the hefty bar with a couple of dunks when I was heat treating with the gas forge. Now I have an electric setup. The heavy bar adds load, takes tongs to get in and out and causes the temps to go down every time I open the door. My aim is out of the oven and into the oil in one shot, so having a heater on the tank makes it way easier.

    Dan
     
  14. Mythtaken

    Mythtaken Staff Member CKM Staff

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    I use a stainless asparagus pot I found in the sale bin at CanadianTire. It fit's perfectly on a hotplate and is deep enough for a decent hunter blade, if you fill it up.
     
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  15. Rob W

    Rob W Active Member

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    for under $7
    a $2 pot from value village , a used single burner hot plate from garage sale for $2.50 and dollar store ($2) thermometer works perfectly in most shops............parks and canola is the expensive part
    keep it simple
     
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  16. Slannesh

    Slannesh Active Member

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    I use an ammo can as well. Lid doubles as fire suppression if need be :)
     
  17. John Noon

    John Noon Well-Known Member

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    Going to be using a large roasting pot I forgot I have, good size and comes with a lid. Playing with the idea of pre heating the oil for quenching then just leaving the knives in the oil and place the whole thing in the oven for tempering.
     
  18. dancom

    dancom Dust Maker Best Shop Tool

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    I've been bashing this idea around of converting a 30lb expired propane tank. This should hold about 7 gallons of oil.

    Now, it seems some folks like the blade going into the quench medium vertically and others lay it in horizontally. I am uncertain if one is better than the other for me at this time.

    I am doing kitchen knives, less than 12" blades. Any suggestions?

    Thanks,

    Dan
     
  19. Brad

    Brad Active Member

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    Vertical or horizontal I don't think it matters much as getting the steel cooled quickly. Choose what you think will work the best for you. I chose horizontal for a couple reasons. Bigger opening less chance I mess up. I can quench a longer blade with less oil. I like to use a limiter plate and edge quench once in a while and that dose not work in a vertical tank
     
  20. dancom

    dancom Dust Maker Best Shop Tool

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    Thanks Brad. I guess if you wanted to differentially harden without clay you would find it difficult to do that in a vertical tank. Horizontal with an optional regulator sounds more flexible.
     

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