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Steel Making

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

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

Placing Of Pyrometers
When installing a pyrometer, care should be taken that it re...

Compensating Leads
By the use of compensating leads, formed of the same materia...

Cyanide Bath For Tool Steels
All high-carbon tool steels are heated in a cyanide bath. Wi...

Cutting-off Steel From Bar
To cut a piece from an annealed bar, cut off with a hack saw,...

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

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...

Suggestions For Handling High-speed Steels
The following suggestions for handling high-speed steels are ...

Heat-treating Department
The heat-treating department occupies an L-shaped building. ...

Hardening Operation
Hardening a gear is accomplished as follows: The gear is tak...

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

Introduction Of Carbon
The matter to which these notes are primarily directed is the...

The Influence Of Size
The size of the piece influences the physical properties obta...

High-carbon Machinery Steel
The carbon content of this steel is above 30 points and is ha...

Lathe And Planer Tools
FORGING.--Gently warm the steel to remove any chill, is parti...

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

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

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

Testing And Inspection Of Heat Treatment
The hard parts of the gear must be so hard that a new mill f...



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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