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Discussion in 'Gunsmithing' started by lightfoot, Nov 25, 2013.
Has anyone ever heard of coating the inside of a rifle barrel with titanium nitride?
No barrel maker approves any coating on the inside of a barrel.
TIN used to be the thing way back but it doesn't wear for beans, much better coatings for tooling now.
Chromium..! Harder than hell and they even line cannon barrels with it.
Some companies use a salt bath nitride for the entire barrel. The benefit is that it draws the carbon up to the surface and hardens the steel at a molecular level down to several thousands below the surface. It provides an extremely hard surface and wears quite well. It also stress relieves the steel at the same time as the bath is kept above 1000 degrees F.
I meant once it's done. If they are to be chromed I believe thy do that before they are sent to the end customer.