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Knowledge You Can Build On — Est. 1998

Good Hope Hardwoods - Walnut Slabs & Specialty Hardwood Lumber

Heat hardening Nicrhrome wire.

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Heat hardening Nicrhrome wire.

#1

Heat hardening Nicrhrome wire.

john lucas

I didn't have much time to play this morning but i tried my hand at making a basket weave burning tool. Apparently I need to play more. I did get one that sort of resembled the tool but it needs experimenting to learn to fold the metal correctly. What I did was heat and flatten a section of the wire. Then I folded the wire into a U shape sort of like folding ribbon at 90 degrees. then flattened the folded corners. Wasn't bad but I think I need to have one of those tools in my hand to really see the original was done. I ground a cove into it and then sharpened it. I seemed to work although this was quite thick wire and I had to turn my Optima burner all the way up to get a burn and then it was just barely hot enough. I have thinner wire but it won't flatten large enough to be able to grind a cove into it.

On the work hardening or heat hardening. With this particular wire that came out of a wall heater I was not able to harden it at all. I didn't try immediately quenching it in something but it cools down very rapidly. I was still able to bend it no matter what i did. I'm sure all nichrome wire is not the same but I certainly don't know. I may have time to play later this evening.

Re: Heat hardening Nicrhrome wire.

#2

Re: Heat hardening Nicrhrome wire.

Tony Rozendaal

FWIW, I recently bought the Razortip unit and some nichrome wire from Craft Supplies - there doesn't seem to be any hardness to the nichrome - I can flatten it (with a hammer) and bend it any way I want with no need to heat it up first.

I haven't tried bending it or reshaping it after it has been heated thoroughly, but I can still make adjustments to make the ends line up with the screws on the pen, so it can't be terribly hard.

Re: Heat hardening Nicrhrome wire.

#3

Re: Heat hardening Nicrhrome wire.

Bill McWhirter

Another FWIW. A free source of nichrome wire is your local HVAC dealer or service man. An electric heat pump or furnace will have about a 6 life-time supply of nichrome wire. They take the whole unit to the scrap yard so the ounce or two of wire makes no difference to them.

Re: Heat hardening Nicrhrome wire.

#4

Re: Heat hardening Nicrhrome wire.

Don Evans

Bill are u talking about the "defrost cycle", the wire that does the heating for that?

Any idea what gauge it is?

Have you removed it from a unit yourself, how difficult was it?

Don

Re: Heat hardening Nicrhrome wire.

#5

Re: Heat hardening Nicrhrome wire.

bill McWhirter

I am talking about the "strip heating" or emergency or auxiliary heating element in an electric heat pump. Located in the main unit located adjacent to the air handler/plenum (large box with fan and all of the ducts running out). It took about 2 minutes at most for my technician to open and pull the wire out. It was coiled in about ½ to ¾ in spiral. I would guess that there was 15-20 feet if you straighten it out. I have made several attempts at making a tool to burn the beads on a basket illusion piece without a great deal of success. Like John, I think that it is a matter of figuring the best way to bend the wire before flattening. The metal does flatten easily, but if you get it too thin it breaks.

Re: Heat hardening Nicrhrome wire.

#6

Re: Heat hardening Nicrhrome wire.

Don Evans

Thanks for clarification, I'm familiar with the coils you refer too.

You can also buy these coil units new and they are not very expensive.

I put two 7500 watt one's in the heat pump in my shop and paid $37.00 each for them. This was the price while they were installing the new HVAC anyway. It was about 7 years ago also.

Don