Heat slowly and uniformly to 1,450 deg.F. and forge thoroughly. Do not under any circumstances attempt to harden at the forging heat. After cooling from forging reheat to about 1,450 deg.F. and cool slowly so as to remove forging strains. ... Read more of Oil-hardening Steel at Steel Making.caInformational Site Network Informational
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Shrinking And Enlarging Work
Steel can be shrunk or enlarged by proper heating and cooling...

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

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

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

For Milling Cutters And Formed Tools
FORGING.--Forge as before.--ANNEALING.--Place the steel in a ...

Silicon
SILICON is a very widespread element (symbol Si), being an es...

The Effect
The heating at 1,600 deg.F. gives the first heat treatment w...

Quenching
It is considered good practice to quench alloy steels from th...

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

Drop Forging Dies
The kind of steel used in the die of course influences the he...

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

Care In Annealing
Not only will benefits in machining be found by careful anne...

Fatigue Tests
It has been known for fifty years that a beam or rod would fa...

Detrimental Elements
Sulphur and phosphorus are two elements known to be detrimen...

Piston Pin
The piston pin on an aviation engine must possess maximum res...

The Pyrometer And Its Use
In the heat treatment of steel, it has become absolutely nece...

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

Annealing To Relieve Internal Stresses
Work quenched from a high temperature and not afterward tempe...

Case-hardening Treatments For Various Steels
Plain water, salt water and linseed oil are the three most co...

Plant For Forging Rifle Barrels
The forging of rifle barrels in large quantities and heat-tre...



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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