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Steel Making

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

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

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

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

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

Connecting Rods
The material used for all connecting rods on the Liberty engi...

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

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

Critical Points
One of the most important means of investigating the properti...

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

Chromium
Chromium when alloyed with steel, has the characteristic func...

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

The Effect Of Tempering On Water-quenched Gages
The following information has been supplied by Automatic and ...

Heavy Forging Practice
In heavy forging practice where the metal is being worked at...

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

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

Take Time For Hardening
Uneven heating and poor quenching has caused loss of many ve...

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

Heating Of Manganese Steel
Another form of heat-treating furnace is that which is used ...

Sulphur
Sulphur is another impurity and high sulphur is even a greate...



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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