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Silicon
Silicon prevents, to a large extent, defects such as gas bubb...

Steel For Chisels And Punches
The highest grades of carbon or tempering steels are to be re...

Quenching
It is considered good practice to quench alloy steels from th...

Heat-treating Equipment And Methods For Mass Production
The heat-treating department of the Brown-Lipe-Chapin Company...

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

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

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

The Thermo-couple
With the application of the thermo-couple, the measurement of...

Steel Can Be Worked Cold
As noted above, steel can be worked cold, as in the case of ...

S A E Heat Treatments
The Society of Automotive Engineers have adopted certain heat...

Hardening High-speed Steel
In forging use coke for fuel in the forge. Heat steel slowly ...

Temperature For Annealing
Theoretically, annealing should be accomplished at a tempera...

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

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

Placing The Thermo-couples
The following illustrations from the Taylor Instrument Compan...

Sulphur
SULPHUR is another element (symbol S) which is always found i...

Heat Treatment Of Gear Blanks
This section is based on a paper read before the American Gea...

Typical Oil-fired Furnaces
Several types of standard oil-fired furnaces are shown herew...

Alloying Elements
Commercial steels of even the simplest types are therefore p...

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



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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