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

Steel Making

Corrosion
This steel like any other steel when distorted by cold worki...

Take Time For Hardening
Uneven heating and poor quenching has caused loss of many ve...

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

Shrinking And Enlarging Work
Steel can be shrunk or enlarged by proper heating and cooling...

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

Pyrometry And Pyrometers
A knowledge of the fundamental principles of pyrometry, or th...

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

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

Manganese
MANGANESE is a metal much like iron. Its chemical symbol is M...

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

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

Making Steel Balls
Steel balls are made from rods or coils according to size, st...

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

Application Of Liberty Engine Materials To The Automotive Industry
The success of the Liberty engine program was an engineer...

Steel Can Be Worked Cold
As noted above, steel can be worked cold, as in the case of ...

Annealing
There is no mystery or secret about the proper annealing of d...

Furnace Data
In order to give definite information concerning furnaces, fu...

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

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

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



Carburizing By Gas






Category: CASE-HARDENING OR SURFACE-CARBURIZING

The process of carburizing by gas, briefly mentioned on page 88,
consists of having a slowly revolving, properly heated, cylindrical
retort into which illuminating gas (a mixture of various hydrocarbons)
is continuously injected under pressure. The spent gases are vented
to insure the greatest speed in carbonizing. The work is constantly
and uniformly exposed to a clean carbonizing atmosphere instead
of partially spent carbonaceous solids which may give off very
complex compounds of phosphorus, sulphur, carbon and nitrogen.

Originally this process was thought to require a gas generator but
it has been discovered that city gas works all right. The gas consists
of vapors derived from petroleum or bituminous coal. Sometimes the
gas supply is diluted by air, to reduce the speed of carburization
and increase the depth.





Next: Preventing Carburizing By Copper-plating

Previous: Case-hardening Treatments For Various Steels



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