[TheForge] Bronze

[James Binnion]

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