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Heat Treating and Metallurgy Discussion of heat treatment and metallurgy in knife making. |
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#1
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What is the secret
What is the secret to making the stainless foil pouches air tight. No matter how many times I fold the edges or how tight I get the seams, I always end up with some air in the bag and then having to try and remove the carbonization. Is there some tutorial somewhere or maybe someone sells zip lock baggies for the kiln. I am willing to try just about anything at this point.
Thanks Steve __________________ Stephen Vanderkolff Please come on over and check out my website. http://www.vanderkolffknives.com/ Thanks |
#2
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Why make them air tight? Just add something to the inside of the pouch to create a reducing atmosphere, I know a couple guys use paper and end up with some pretty excellent results.
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#3
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Here is what I use, works perfect.
http://www.sonicelectronix.com/item_...r-Dynamat.html The method I use is fold the foil so there is about a 1/2 seam and roll repeatedly with the roller, now fold again and roll. Yes folding twice uses more of that exspencive foil but as long as my tip does not puncture the foil, I have had 100% suuccess in making a air tight pouch. Personally I have never tried the "paper in the pouch" to use the oxgen but several people have said it works. Brett |
#4
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I use a wide welding plier from Harbour Freight to fold the foil. Then a second time fold on both ends. I use kraft paper or cardboard piece inside the envelope to take care of oxygen. Doublefold the top of envelope again. I insert the blade edge up when making the envelope.
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#5
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Steve, some good advice here, buddy.
I double wrap mine with folds on opposite sides. I place a piece of brown paper grocery bag inside the very first layer with the work piece. This burns and eats up the oxygen inside the package. __________________ Blade Show Table 8-Q What do you do when you see your ex in pain, limping and bleeding? Relax. Take a deep breath. Reload and then shoot again. http://www.andersenforge.com/ |
#6
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Steve, I do not use any paper inside the pouch and get perfect results. I also use a double fold on all open sides. The difference is that I use a smooth face ball peen hammer to lightly tap the intire lenght of the fold while the pouch is laying on a smooth hard surface.
I make first fold, and tap intire lenght, maked second fold and tap intire lenght again. Just make sure the hammer has a very smooth face to prevent making small holes in the foil. __________________ RELH |
#7
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I don't have any problems.
I simply fold once, draw the head of a wooden mallet along the fold, fold again, drag the mallet head hard along the edge again. Double fold on the side and both ends mashed flat by drawing the mallet along the edges. I don't add anything inside. |
#8
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I know that using foil helps, but what is the idea precisely? Also, am I right to assume that when using a foil pouch, you are using a heat treating oven instead of a forege type setup?
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#9
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The foil is used to protect the work from scaling. At the temps (1900's) necessary for treating stainless knife steels and the soak times at temp., the steel would lose a lot of carbon, which turns into scale.
Yes, it's used in a furnace. Last edited by Don Robinson; 08-25-2013 at 07:09 AM. |
#10
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Gotcha, thanks...
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#11
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I double fold all mine and also put 2 pinches of hard wood saw dust in the pouches one on the foil lay the knife on it and sprinkle the other on the blade before closing up ( like sprinkling salt on food ) I have a shaker for my fine saw dust (Hardwood type ) it acts just like the paper as it consumes the oxygen in the foil pack. just my way of doing it Old Smith showed me about 15 years ago .
Sam __________________ R. Yates 13 & On Forge Live and Let Live , Do Not trespass on Life or Me! As we are not so kind or forgiving ! |
#12
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Note: There is a low temperature foil and a hi temperature foil!
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#13
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Quote:
Having fun and learning!! Ken H> |
Tags |
advice, blade, blades, edge, flat, folding, forge, hammer, heat, knife, lock, make, making, package, stainless, surface, tutorial, wood, wrap |
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