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The Penetration Of Carbon
Carburized mild steel is used to a great extent in the manufa...

Preventing Decarbonization Of Tool Steel
It is especially important to prevent decarbonization in such...

Nickel
Nickel may be considered as the toughest among the non-rare a...

Flange Shields For Furnaces
Such portable flame shields as the one illustrated in Fig. 1...

Heating Of Manganese Steel
Another form of heat-treating furnace is that which is used ...

Oil-hardening Steel
Heat slowly and uniformly to 1,450 deg.F. and forge thorough...

Annealing
There is no mystery or secret about the proper annealing of d...

Application Of Liberty Engine Materials To The Automotive Industry
The success of the Liberty engine program was an engineer...

Quenching The Work
In some operations case-hardened work is quenched from the bo...

Annealing Alloy Steel
The term alloy steel, from the steel maker's point of view, r...

Steel Worked In Austenitic State
As a general rule steel should be worked when it is in the a...

Detrimental Elements
Sulphur and phosphorus are two elements known to be detrimen...

Furnace Data
In order to give definite information concerning furnaces, fu...

Open Hearth Process
The open hearth furnace consists of a big brick room with a l...

Tempering Colors On Carbon Steels
Opinions differ as to the temperature which is indicated by t...

Process Of Carburizing
Carburizing imparts a shell of high-carbon content to a low-...

Effect Of A Small Amount Of Copper In Medium-carbon Steel
This shows the result of tests by C. R. Hayward and A. B. Joh...

Gears
The material used for all gears on the Liberty engine was sel...

The Theory Of Tempering
Steel that has been hardened is generally harder and more br...

Heat Treatment Of Axles
Parts of this general type should be heat-treated to show the...



Annealing Of Rifle Components At Springfield Armory






Category: CASE-HARDENING OR SURFACE-CARBURIZING

In general, all forgings of the components of the arms manufactured
at the Armory and all forgings for other ordnance establishments
are packed in charcoal, lime or suitable material and annealed
before being transferred from the forge shop.

Except in special cases, all annealing will be done in annealing
pots of appropriate size. One fire end of a thermo-couple is inserted
in the center of the annealing pot nearest the middle of the furnace

and another in the furnace outside of but near the annealing pots.

The temperatures used in annealing carbon steel components of the
various classes used at the Armory vary from 800 deg.C. To 880 deg.C. or
1,475 to 1,615 deg.F.

The fuel is shut off from the annealing furnace gradually as the
temperature of the pot approaches the prescribed annealing temperature
so as to prevent heating beyond that temperature.

The forgings of the rifle barrel and the pistol barrel are exceptions
to the above general rule. These forgings will be packed in lime
and allowed to cool slowly from the residual heat after forging.





Next: Surface Carburizing

Previous: Annealing In Bone



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