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Annealing Of Rifle Components At Springfield Armory
In general, all forgings of the components of the arms manufa...

Using Illuminating Gas
The choice of a carburizing furnace depends greatly on the fa...

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

Hardening High-speed Steels
We will now take up the matter of hardening high-speed steels...

The Theory Of Tempering
Steel that has been hardened is generally harder and more br...

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

Suggestions For Handling High-speed Steels
The following suggestions for handling high-speed steels are ...

Complete Calibration Of Pyrometers
For the complete calibration of a thermo-couple of unknown e...

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

Effects Of Proper Annealing
Proper annealing of low-carbon steels causes a complete solu...

Silicon
Silicon prevents, to a large extent, defects such as gas bubb...

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

Surface Carburizing
Carburizing, commonly called case-hardening, is the art of pr...

Highly Stressed Parts
The highly stressed parts on the Liberty engine consisted of ...

Correction By Zero Adjustment
Many pyrometers are supplied with a zero adjuster, by means ...

Heat Treatment Of Gear Blanks
This section is based on a paper read before the American Gea...

Phosphorus
PHOSPHORUS is an element (symbol P) which enters the metal fr...

Separating The Work From The Compound
During the pulling of the heat, the pots are dumped upon a ca...

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

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



Temperature For Annealing






Category: HEAT TREATMENT OF STEEL

Theoretically, annealing should be
accomplished at a temperature at just slightly above the critical
point. However, in practice the temperature is raised to a higher
point in order to allow for the solution of the carbon and iron to
be produced more rapidly, as the time required to produce complete
solution is reduced as the temperature increases past the critical
point.

For annealing the simpler types of low-carbon steels the following
temperatures have been found to produce uniform machining conditions
on account of producing uniform fine-grain pearlite structure:

0.15 to 0.25 per cent carbon, straight carbon steel.--Heat to 1,650 deg.F.
Hold at this temperature until the work is uniformly heated; pull
from the furnace and cool in air.

0.15 to 0.25 per cent carbon, 1-1/2 per cent nickel, 1/2 per cent
chromium steel.--Heat to 1,600 deg.F. Hold at this temperature until
the work is uniformly heated; pull from the furnace and cool in air.

0.15 to 0.25 per cent carbon, 3-1/2 per cent nickel steel.--Heat
to 1,575 deg.F. Hold at this temperature until the work is uniformly
heated; pull from the furnace and cool in air.





Next: Care In Annealing

Previous: Effects Of Proper Annealing



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