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   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

Quality And Structure
The quality of high-speed steel is dependent to a very great ...

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

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

The Packing Department
In Fig. 56 is shown the packing pots where the work is packe...

Preventing Decarbonization Of Tool Steel
It is especially important to prevent decarbonization in such...

Testing And Inspection Of Heat Treatment
The hard parts of the gear must be so hard that a new mill f...

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

Gas Consumption For Carburizing
Although the advantages offered by the gas-fired furnace for ...

Effect Of A Small Amount Of Copper In Medium-carbon Steel
This shows the result of tests by C. R. Hayward and A. B. Joh...

Heat-treating Department
The heat-treating department occupies an L-shaped building. ...

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

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

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

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

Hardness Testing
The word hardness is used to express various properties of me...

Placing Of Pyrometers
When installing a pyrometer, care should be taken that it re...

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

Robert Mushet
Robert (Forester) Mushet (1811-1891), born in the Forest of D...

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

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



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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