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Heat treating using heating elements


Hurl Vreeland
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I was thinking of using these http://www.mcmaster.com/#3540k35/=53ss87 (scroll down to the bendable elements) and molding a cork screw type shape and insulating with kaowool on the OD of the elements. It can go as high as 1700 but I need only 1400 or so.

 

Coupled with a controller this would seem to work nicely.

 

Has anyone used or made someting like this?

 

I would go with a salt bath but it is too much money and time in relation to my limited use.

Edited by Hurl Vreeland
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I wonder if that would be good for salts....

Let not the swords of good and free men be reforged into plowshares, but may they rest in a place of honor; ready, well oiled and God willing unused. For if the price of peace becomes licking the boots of tyrants, then "To Arms!" I say, and may the fortunes of war smile upon patriots

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Go here tell them what size of furnace you want to build and let them recomend

the ellements you need for what you are doing. Saves a lot of guess work.

 

Bob

http://www.duralite.com/kiln-furnace-studio.htm

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I feel it would work I just wanted to know if anyone has made this before. I was going to wrap the element around a 4" mandrel about a foot long. Wrap about 3 to 4" of Kaowool around that and sheath it with a piece of pipe.

 

I would be well within the temp range of the elements.

 

 

I don't see why it wouldnt work for a salt tank assuming the sheathing for the elements was rated for it. I would have the element coming out of the salt a bit though so you wouldnt get any bubbles.

 

The salt stuff is out of my realm though so its all a guess.

 

I just wanted something to use at work that is low profile and I could just plug it in and treat my blades.

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OK, your idea suddenly clicked into place. I think that would work, though you might want to do it as a vertical, since the elements are live (electrically) and you don't want to get zapped. Another issue is the elements sagging and changing length as they heat and cool. Mostly people build a box of fire brick, with the elements channeled into the brick. It's a special purpose kiln, in effect. Dee did a how-to here a while back, a search should turn it up.

 

Geoff

Edited by Geoff Keyes

"The worst day smithing is better than the best day working for someone else."

 

I said that.

 

If a thing is worth doing, it is worth doing badly.

- - -G. K. Chesterton

 

So, just for the record: the fact that it does work still should not be taken as definitive proof that you are not crazy.

 

Grant Sarver

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This is what I was looking for:

 

http://images.google.com/imgres?imgurl=http://www.mhi-inc.com/IMAGES/coil012.jpg&imgrefurl=http://www.mhi-inc.com/PG5/CoilQuote.htm&usg=__Fibk6eUNQ7nPa_xlfLcL7L8v2Yo=&h=229&w=320&sz=14&hl=en&start=131&um=1&tbnid=gGOoZVqipqTVAM:&tbnh=84&tbnw=118&prev=/images%3Fq%3Dcoiled%2Bheater%2Belements%26ndsp%3D21%26hl%3Den%26safe%3Doff%26sa%3DN%26start%3D126%26um%3D1

 

Rigid, just like an oven and like an oven if metal does contact the element no shorting. No sagging either and not as fragile as the wire element. I wondered if you could heat an element out of an old oven and remold it around an mandrel.

 

Thanks for all the replies!!

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