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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...

Steel Worked In Austenitic State
As a general rule steel should be worked when it is in the a...

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

Vanadium
Vanadium has a very marked effect upon alloy steels rich in c...

An Automatic Temperature Control Pyrometer
Automatic temperature control instruments are similar to the ...

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

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

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

Rate Of Absorption
According to Guillet, the absorption of carbon is favored by ...

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

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

Preventing Carburizing By Copper-plating
Copper-plating has been found effective and must have a thick...

Carbon-steel Forgings
Low-stressed, carbon-steel forgings include such parts as car...

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

Sulphur
SULPHUR is another element (symbol S) which is always found i...

Crankshaft
The crankshaft was the most highly stressed part of the entir...

Forging High-speed Steel
Heat very slowly and carefully to from 1,800 to 2,000 deg.F....

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

Typical Oil-fired Furnaces
Several types of standard oil-fired furnaces are shown herew...



Gears






Category: APPLICATION OF LIBERTY ENGINE MATERIALS TO THE AUTOMOTIVE INDUSTRY

The material used for all gears on the Liberty engine was selected
at the option of the manufacturer from the following standard S.
A. E. steels, the composition of which are given in Table 12,

TABLE 12.--COMPOSITION OF STEELS NOS. X-3,340 AND 6,140

Steel No X-3,340 6,140
Carbon, minimum 0.350 0.350
Carbon, maximum 0.450 0.450
Manganese, minimum 0.450 0.500
Manganese, maximum 0.750 0.800
Phosphorus, maximum 0.040 0.040
Sulphur, maximum 0.045 0.045
Nickel, minimum 2.750
Nickel, maximum 3.250
Chromium, minimum 0.700 0.800
Chromium, maximum 0.950 1.100
Vanadium, minimum 0.150

All gears were heat-treated to a scleroscope hardness of from 55
to 55. The heat treatment used to secure this hardness consisted
in quenching the forgings from a temperature of 1,550 to 1,600 deg.F.
in oil and annealing for good machineability at a temperature of
from 1,300 to 1,350 deg.F. Forgings treated in this manner showed a
Brinell hardness of from 177 to 217.





Next: Rate Of Cooling

Previous: Highly Stressed Parts



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