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

The Leeds And Northrup Potentiometer System
The potentiometer pyrometer system is both flexible and subst...

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

Phosphorus
Phosphorus is one of the impurities in steel, and it has been...

Molybdenum
Molybdenum steels have been made commercially for twenty-five...

Classifications Of Steel
Among makers and sellers, carbon tool-steels are classed by g...

Bessemer Process
The bessemer process consists of charging molten pig iron int...

Phosphorus
PHOSPHORUS is an element (symbol P) which enters the metal fr...

Effects Of Proper Annealing
Proper annealing of low-carbon steels causes a complete solu...

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

Properties Of Alloy Steels
The following table shows the percentages of carbon, manganes...

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...

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

Heating
Although it is possible to work steels cold, to an extent de...

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

Shrinking And Enlarging Work
Steel can be shrunk or enlarged by proper heating and cooling...

Rate Of Cooling
At the option of the manufacturer, the above treatment of gea...

Protective Screens For Furnaces
Workmen needlessly exposed to the flames, heat and glare from...

Heat Treatment Of Axles
Parts of this general type should be heat-treated to show the...



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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