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Steel Making

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

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

Properties Of Steel
Steels are known by certain tests. Early tests were more or l...

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

Annealing Method
Forgings which are too hard to machine are put in pots with ...

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

Nickel
Nickel may be considered as the toughest among the non-rare a...

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

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

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

Crucible Steel
Crucible steel is still made by melting material in a clay or...

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

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

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

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

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

Ebbw Vale And The Bessemer Process
After his British Association address in August 1856, Besseme...

Tool Or Crucible Steel
Crucible steel can be annealed either in muffled furnace or b...

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

Temperature Recording And Regulation
Each furnace is equipped with pyrometers, but the reading an...



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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