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   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

Tempering Round Dies
A number of circular dies of carbon tool steel for use in too...

Care In Annealing
Not only will benefits in machining be found by careful anne...

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

Corrosion
This steel like any other steel when distorted by cold worki...

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

Annealing In Bone
Steel and cast iron may both be annealed in granulated bone. ...

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

Manganese
MANGANESE is a metal much like iron. Its chemical symbol is M...

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

Heat Treatment Of Punches And Dies Shears Taps Etc
HEATING.--The degree to which tools of the above classes shou...

Preparing Parts For Local Case-hardening
At the works of the Dayton Engineering Laboratories Company, ...

Correction For Cold-junction Errors
The voltage generated by a thermo-couple of an electric pyrom...

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

Complete Calibration Of Pyrometers
For the complete calibration of a thermo-couple of unknown e...

Affinity Of Nickel Steel For Carbon
The carbon- and nickel-steel gears are carburized separately...

Pickling The Forgings
The forgings were then pickled in a hot solution of either ni...

The Pyrometer And Its Use
In the heat treatment of steel, it has become absolutely nece...

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

Carbon Steels For Different Tools
All users of tool steels should carefully study the different...

Heat Treatment Of Steel
Heat treatment consists in heating and cooling metal at defin...



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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