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Steel Making

Nickel-chromium
A combination of the characteristics of nickel and the charac...

Liberty Motor Connecting Rods
The requirements for materials for the Liberty motor connecti...

Brown Automatic Signaling Pyrometer
In large heat-treating plants it has been customary to mainta...

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

Machineability
Reheating for machine ability was done at 100 deg. less than ...

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

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

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

Annealing Of Rifle Components At Springfield Armory
In general, all forgings of the components of the arms manufa...

Chrome-nickel Steel
Forging heat of chrome-nickel steel depends very largely on ...

Refining The Grain
This is remedied by reheating the piece to a temperature slig...

Manganese
Manganese adds considerably to the tensile strength of steel,...

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

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

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

Hardening Carbon Steel For Tools
For years the toolmaker had full sway in regard to make of st...

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

Leeds And Northrup Optical Pyrometer
The principles of this very popular method of measuring tempe...

Temperatures To Use
As soon as the temperature of the steel reaches 100 deg.C. (...

Forging High-speed Steel
Heat very slowly and carefully to from 1,800 to 2,000 deg.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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