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Steel Making

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

Steel For Chisels And Punches
The highest grades of carbon or tempering steels are to be re...

Instructions For Working High-speed Steel
Owing to the wide variations in the composition of high-speed...

Carbon Tool Steel
Heat to a bright red, about 1,500 to 1,550 deg.F. Do not ham...

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

Quenching The Work
In some operations case-hardened work is quenched from the bo...

The Forging Of Steel
So much depends upon the forging of steel that this operation...

Carburizing Material
The simplest carburizing substance is charcoal. It is also th...

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

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

The Modern Hardening Room
A hardening room of today means a very different place from ...

Carburizing By Gas
The process of carburizing by gas, briefly mentioned on page ...

Tempering Colors On Carbon Steels
Opinions differ as to the temperature which is indicated by t...

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

Gears
The material used for all gears on the Liberty engine was sel...

Double Annealing
Water annealing consists in heating the piece, allowing it to...

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

The Electric Process
The fourth method of manufacturing steel is by the electric f...

Heat Treatment Of Milling Cutters Drills Reamers Etc
THE FIRE.--Gas and electric furnaces designed for high heats ...

Heat-treating Equipment And Methods For Mass Production
The heat-treating department of the Brown-Lipe-Chapin Company...



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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