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Thread: Color case hardening
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30th Mar 2023, 12:19 PM #1
Color case hardening
In response to a query in the electrical forum.
This comes up once in a while in Muzzleloading and firearms circles.
family guy
I couldn't find the notes and think they maybe be with a book I had lent and never got back.
The procedure I recall involved crushed cow hooves for the carbon content. As the name suggests the colour is a result but also the thin skin of hardness covering the surface of the treated part to a shallow part.
It applies to parts like lock side plates and flintlock frizzen faces. My black powder Pedersoli Tryon .54 cal roundball percussion rifle has colour case hardened, lock plate, butt plate and patch ball cover plate.
https://www.youtube.com › watch?v=spj9ndC452M
from the Muzzleloading Forum-American-:
true color case hardening is a whole new world. you need a metal crucible, that has a tight air proof lid. bone meal, and a hot fire. it is involved. if not done right you wind up with warped parts or cracked,
https://www.youtube.com/watch?v=A9ExouQ2byY
also a selection of random discussion about same subject in the yank Muzzleloading forum.
I hope you can get in without a login
https://www.muzzleloadingforum.com/t...dening.104405/
Also talk of bone meal.Is that the same as our very own Oz blood and bone fertilizer?
I hope this assists.
GrahameLast edited by Grahame Collins; 30th Mar 2023 at 01:00 PM. Reason: extra stuff I missed 1st time around
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30th Mar 2023, 11:28 PM #2Golden Member
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Thanks for the links - if you haven't already seen this, it is well worth checking out, uses wood and bone charcoal, no cyanide involved
(2) Color Casehardening: A photo and video tutorial | Home Model Engine Machinist Forum
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31st Mar 2023, 02:16 PM #3
I picked up from some of those links that CCH was not good for the electric Heat treatment oven elements and continued use may contribute to premature failure.
A good thing to know.
GrahameLast edited by Grahame Collins; 25th Apr 2023 at 11:23 PM.
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1st May 2023, 11:05 AM #4Senior Member
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I've done a bit of CCH.
Most of what I know came from this thread on the Marlin Collectors forum: https://marlin-collectors.com/forum/...pic.php?t=3732
Made my own bone and hardwood charcoal by collecting cow bones and hardwood, packing in tightly into large tin with a vent hole and burning the whole thing in a fire pot.
https://metalworkforums.com/f268/t20...ni-rifle-build
Shielding of the parts for the quench is very important for colour formation. But otherwise the process was not overly complicated. Doesn't need to be an air tight crucible, but well packed with charcoal to limit exposure to oxygen and the burning hot charcoal consumes the local oxygen protecting the part.
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1st May 2023, 06:27 PM #5
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30th May 2023, 10:54 PM #6New Member
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Here is another useful video on this topic https://www.youtube.com/watch?v=O0EW_4TP6u8
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26th Nov 2023, 09:04 PM #7
Another video for Colour Case Hardening
Hi All, here is another video form AA Brown Gunmakers near Birmingham
https://www.youtube.com/watch?v=oceR5f8d9WM
I have done a little and had reasonable results -- still learning ! I have done a fair amount of commercial case hardening for toolroom work back in the 1960's but CCaseH is somewhat different particularly in relation to temperature and of course the hardening medium.
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