Re: [EVGRAY] Dotto Ring

Body

MickJust take the torch and heat it to a grey cherry red. You can either let it sit for an hour, until it is cool enough to touch, or you can quench it in water to remove the scale, and get to work with it right away.In either case, it will be soft.Hammering it, rolling it, swaging, drilling, bending, all make copper "work harden" as was done from ancient times to actually make knives and swords out of copper. Still, it was a poor metal to " hold an edge" , so the ancients added tin to make an alloy called bronze, which could be slightly harder.....and so on into alchemy and metalurgy.Norm is talking about soft copper, which when you heat to a cherry red, you"normalize" the metal releasing all the internal stresses caused by work hardening, and making it into one continuous metal object capable of a uniform ability to carry electrical fields, without nasty local hard spots where it was worked.Unless there are other metals alloyed into copper, quenching will not make any difference to the final product.Iron is a whole other ball game along with all of its alloys, as is alluminium and the entire periodic scale of elements called metals. By comparison, copper is pretty basic, and reliable.Cheers Warren
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  On Fri, Mar 23, 2018 at 11:46 PM, Mick [email protected] [EVGRAY]<[email protected]> wrote:       
 

Warren,
 
What is the procedure then in order to anneal copper in the way Norm mentions in order that it become within one percent of a perfect conductor?
 
Would this be simply to bring it within so many degrees of incandescence for so long and slowly cool it?
 
 
My only experience is oil quenching steel to harden it in a machine shop I worked at.
 
 
 On 3/23/2018 7:46 PM, Warren Keillor [email protected] [EVGRAY] wrote:
  
        Mick Heat treating metals is a whole branch of metalurgy science. Copper work hardens. Heat softens it and wuenching does very little except cool it so you don't burn your fingers. Cheers Warren
 Sent from Yahoo Mail on Androidmick 
 
  On Fri, Mar 23, 2018 at 8:25 PM, Mick [email protected] [EVGRAY] <[email protected]> wrote:          
 
 
Darrell,
 
Isn't quenching for hardening or is it also used in anealing?
 
 
  On 3/23/2018 1:28 PM, [email protected] [EVGRAY] wrote:
  
    
Hi Norman my friend, It's been my experience in the past when I was into heat treating metals,  that you really don't need to go cherry red, just heat it up ( propane torch) until it turns a nice solid gray color. Then quench it, No need to cool it  slowly either. Worked for me.
  
  
       
      
 
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