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Steel Making

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

Carburizing Material
The simplest carburizing substance is charcoal. It is also th...

Vanadium has a very marked effect upon alloy steels rich in c...

Hints For Tool Steel Users
Do not hesitate to ask for information from the maker as to t...

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

Heat Treatment Of Lathe Planer And Similar Tools
FIRE.--For these tools a good fire is one made of hard foundr...

Air-hardening Steels
These steels are recommended for boring, turning and planing...

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

A Chromium-cobalt Steel
The Latrobe Steel Company make a high-speed steel without tun...

ANNEALING can be done by heating to temperatures ranging from...

The crankshaft was the most highly stressed part of the entir...

An Automatic Temperature Control Pyrometer
Automatic temperature control instruments are similar to the ...

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...

Calibration Of Pyrometer With Common Salt
An easy and convenient method for standardization and one whi...

Short Method Of Treatment
In the new method, the packed pots are run into the case-har...

Double Annealing
Water annealing consists in heating the piece, allowing it to...

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

Carburizing Low-carbon Sleeves
Low-carbon sleeves are carburized and pushed on malleable-ir...

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

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

Annealing Of Rifle Components At Springfield Armory


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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