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.


YouTube › 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,

Color-Case Hardening: 1895 Marlin - YouTube

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.

Grahame


Read and reply to the full thread at metalworkorums.com....