[TheForge] Bronze

[Peter Fels & Phoebe Palmer]

Thanks

James Binnion wrote:
> Yes.
> On Aug 4, 2010, at 11:36 PM, Peter Fels & Phoebe Palmer wrote:
> 
>> Jim;
>> When you say you can't anneal Cu alloys without having
>> cold worked it...
>> Is that because it's already annealed from the hot
>> working temperature?
>> That's what i'd been assuming.
>>
>> James Binnion wrote:
>>> On Aug 4, 2010, at 7:52 PM, Kim George wrote:
>>>
>>>> You should also quench it
>>>> about every third time. Re member when you do that you are annealing
>>>> the piece.All nonferrous metals are like that.
>>> This is not right. Annealing of any metal or alloy comes from heating
>>> it past the point of stress relief and into the recrystallization
>>> temperature range. Where that temperature range is depends on the
>>> physical properties of the alloy or metal and how much cold work you
>>> have put into it, the more cold work the lower the temperature. Not
>>> enough cold work and you will not be able to anneal it. If you are  
>>> hot
>>> forging the work and do not put any cold work into it you cannot
>>> anneal it, you can heat it to the point of crystal growth (which is
>>> generally a bad thing) but you will not get recrystallization.
>>>
>>> Some alloys care about how you cool them after annealing and some
>>> don't. Some need a rapid quench some need a slow cooling and with  
>>> some
>>> it just don't matter. Non ferrous metals vary in what is needed just
>>> as ferrous ones do. If in doubt look it up, the internet is full of
>>> alloy data sheets that have hot work temperatures, annealing
>>> temperatures and other useful info.
>>>
>>>
>>>
>>> James Binnion
>>> jbin at well.com
>>>
>>>
>>>
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> 
> James Binnion
> jbin at well.com
> 
> 
> 
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