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Hot Topic (More than 10 Replies) Quenching bullets. (Read 2607 times)
Dellet
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Re: Quenching bullets.
Reply #15 - Jun 1st, 2022 at 6:49pm
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Schuetzendave wrote on Jun 1st, 2022 at 6:32pm:
Quenching after heat treating the alloy for an extended time results in hardening.

However I still have seen no indication the quenching of newly molded bullets results in hardening.

The heat treatment process results in the increased bullet hardness  changing the crystalline structure of the alloy.
This change in structure needs an extended period of holding at a temperature of 400F. to 480F. 
Dropping new bullets in water after forming does not result in the required change in molecular structure which improves hardness.

Sorry, misunderstood the question. Thought you questioned whether quenching had a scientific basis. Not which heating method or time at temp needed to be used for quenching/heat treatment to work.
  
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Cbashooter
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Re: Quenching bullets.
Reply #16 - Jun 1st, 2022 at 8:30pm
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Dusty Rhodes wrote on Jun 1st, 2022 at 4:34am:
Cbashooter wrote on Jun 1st, 2022 at 2:51am:
I don't belive tin and lead alone will harden beyond its standard BHN from quenching.i think antimony (and or) arsenic need to be present.


Interesting. Have you proved that. ? 
I seem to think I've heard that before. ??

As I remember the one and only RCBS Cast Bullet Manual had an article by a metalergist explaining it. I think it was Dennis Marshall.
  
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Dusty Rhodes
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Re: Quenching bullets.
Reply #17 - Jun 3rd, 2022 at 7:00am
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Thanks for all the input guys. 👍🇦🇺
  
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beltfed
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Re: Quenching bullets.
Reply #18 - Jun 3rd, 2022 at 9:59am
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You can read about the metallurgy, age hardening,etc
of Lead alloys
in the "Col Harrisons Cast bullet ..."manual if you go into the 
top thread listings on this "Reloading the Single Shot Rifle.
Also, the Lyman 3rd Edition of Cast Bullet Handbook has similar info.
beltfed/arnie
  
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beltfed
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Re: Quenching bullets.
Reply #19 - Jun 3rd, 2022 at 10:03am
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Here is a page from the NRA CBH
  
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Poorhouse
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Re: Quenching bullets.
Reply #20 - Jun 4th, 2022 at 11:10pm
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When I used to cast .45 ACP wheel-weight bullets with gang molds, I cooked bullets an old toaster oven for hardness (LBT tester).  They would soften over time, but not quickly.  I was shooting them at a high rate (Thompson full-auto) so never bothered to document the loss of hardness.  I tried quenching, but learned the hard way that baking was much safer. Heavy apron saved me.
  
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