IBI barrel blanks

Stress relieving is a form of heat treating. Annealing, Hardening, Normaizing, Tempering and Stress Relieiving all rely on heating the material to a specific temeperature, holding that temperature for a certain amount of time, and then “quenching” the part, which can range in time from seconds to hours, depending on the heat treaters objective. Saying something is Heat Treated is entirely meaningless without other terms to make it relevant.
 
Lilja Precision Rifle Barrels - Articles: The Making of a Rifle Barrel

Heat treatment of metal is done by raising the temperature to a point where there is a change in the crystal structure of the metal (an expert can look under a microscope and see what has been done). But the actual crystal structure is on a molecular level. Depending on what you are trying to do, the metal is either quenched to prevent the crystal structure from changing, or allowed to cool slowly.

Crystal structure is different depending on whether it was cast, forged, or tempered in the first place. Button rifling is basically a forging process and can put stress in the barrel, and the heat treatment can remove that stress be bringing it back to it's pre-forged condition.

Queching steel while it is hot hardens the steel, but it can also make it brittle, so you have to know the right temperature for the application. Often a tempered steel piece is added to a forged piece for toughness (wood cutting chisels for example).
 
remington jim said:
Lilja Precision Rifle Barrels - Articles: The Making of a Rifle Barrel

Heat treatment of metal is done by raising the temperature to a point where there is a change in the crystal structure of the metal (an expert can look under a microscope and see what has been done). But the actual crystal structure is on a molecular level. Depending on what you are trying to do, the metal is either quenched to prevent the crystal structure from changing, or allowed to cool slowly.

Crystal structure is different depending on whether it was cast, forged, or tempered in the first place. Button rifling is basically a forging process and can put stress in the barrel, and the heat treatment can remove that stress be bringing it back to it's pre-forged condition.

Queching steel while it is hot hardens the steel, but it can also make it brittle, so you have to know the right temperature for the application. Often a tempered steel piece is added to a forged piece for toughness (wood cutting chisels for example).
Click to expand...

That entire quote is so full of crap as to be essentially useless information. Written by sales dweebs, not anyone attempting to pass on any really useful info.

Blastattack's post above, really does give you way better info. Normalizing, annealing, cryro treating, as well as hardening and tempering, are all encompassed by "heat treatment".

Not all steel will harden when quenched either, some require very specific temperature regimes in a carefully controlled oven to harden at all, others simply will not harden, depending again, on about six dozen or fewer variables which could come in to play.
 
remington jim said:
m14medic.ca SAYS - They actually heat treat their barrels unlike some of the other offerings coming out of Canada....

So WHAT does heat treating do for a barrel over a non heat treated barrel ?? RJ
Click to expand...

Longshot said:
Heat treating and stress relieving are two different things. IBI stress relieves thier blanks twice during manufacturing.
If a barrel isnt properly stress relieved it can create issues in a number of different ways.
Click to expand...

remington jim said:
Pretty SURE every Barrel maker stress relieves there barrels - at least once or two times ! What is this " HEAT TREATING " m14medic.ca Speaks of ? RJ
Click to expand...

This “heat treating” I’m am speaking about is something I was told by a fella.... the fella in question apparently doesn’t know shine from shinola and I have made an azz out of myself for repeating something I heard, that it turns out, isn’t true....

I will defer to Longshot’s expertise in all things IBI, and quietly slink back into the corner and just lurk....

John
 
You must log in or register to reply here.
Back
Top Bottom