Project of the Month built by driller1432

Help Support Home Model Engine Machinist by donating using the link above or becoming a Supporting Member.
Home Model Engine Machinist > The Tools and Tips > Metals > Work hardened brass

Reply
 
Thread Tools
Old 12-20-2017, 03:36 AM   #11
Cogsy
 
Cogsy's Avatar
 
Join Date: Jul 2012
Location: Perth, Western Australia
Posts: 1,822
Liked 486 Times on 378 Posts
Likes Given: 475

Default

I think (and equally could be entirely wrong here) but the difference is the temperatures between various metals. Putting too much heat into a steel, above curie temp, and you're into the hardening range where properties are changing rapidly. Once you have the properties you're after you rapidly cool it to lock those properties in. Putting just enough heat is providing energy for the molecules to start nicely aligning and increasing the malleability of the metal, which is annealing (I think of it sort of like 'untangling the threads' of the material so it's easy to bend). Again, when the required properties are obtained we can quench the material and 'set' those properties. As I said, I think this is the case for most metals but there's bound to be other properties to consider for different metals.


__________________
Al.
______________________
I'd like to be a perfectionist, but I lack the patience...not to mention the skill...
Cogsy is offline  
 
Reply With Quote
Old 12-20-2017, 12:35 PM   #12
crueby
Project of the Month Winner!!!
 
crueby's Avatar
 
Join Date: Mar 2010
Location: Near Rochester, NY
Posts: 589
Liked 721 Times on 329 Posts
Likes Given: 1

Default

When annealing brass/copper, its the heat that matters, all the quenching does is let you get back to work faster. It does not matter when annealing brass/copper if you quench or just let it air cool.


__________________
Life's too short not to go sailing!
crueby is offline  
bazmak Likes This 
Reply With Quote
Old 12-26-2017, 01:00 PM   #13
tornitore45
HMEM_LIFETIMESUPPORTER.png
 
Join Date: Jan 2009
Location: Austin TX
Posts: 446
Liked 78 Times on 64 Posts
Likes Given: 23

Default

Quote:
When annealing brass/copper, its the heat that matters, all the quenching does is let you get back to work faster. It does not matter when annealing brass/copper if you quench or just let it air cool.
Finally, Crueby got it right!
__________________
Mauro
Austin, TX
USA
tornitore45 is offline  
 
Reply With Quote
Old 12-26-2017, 10:21 PM   #14
fcheslop
 
Join Date: Apr 2010
Posts: 537
Liked 99 Times on 77 Posts
Likes Given: 6

Default

Although it makes no difference if you quench or not. I find it better to quench the brass or copper into a mild pickling solution as it cleans the oxide from the job . More important when flanging as it saves the oxide becoming embedded into the metal when bashing it over formers. Once the brass or copper is clean for decorative work you can get some nice colouring effects using a torch
just my two pennies worth
cheers


fcheslop is offline  
bazmak Likes This 
Reply With Quote
Reply


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Drilling and tapping hardened steel Naiveambition Metals 22 05-08-2017 02:14 AM
A color case hardened & charcoal blued machinst hammer 44-henry Photos and Videos 0 12-16-2016 04:32 PM
Can brass be hardened after silver soldering Dave Sohlstrom General Engine Discussion 1 04-26-2013 06:28 PM
Turning a hardened shaft Jeremy_BP General Engine Discussion 7 08-14-2012 07:24 PM



Newest Threads






- Top - Member List