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

Steel Making

Placing The Thermo-couples
The following illustrations from the Taylor Instrument Compan...

Compensating Leads
By the use of compensating leads, formed of the same materia...

A combination of the characteristics of nickel and the charac...

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

High Speed Steel
For centuries the secret art of making tool steel was handed ...

Refining The Grain
This is remedied by reheating the piece to a temperature slig...

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

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

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

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

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

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

Heat Treatment Of Axles
Parts of this general type should be heat-treated to show the...

The Effect Of Tempering On Water-quenched Gages
The following information has been supplied by Automatic and ...

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

Hardening Operation
Hardening a gear is accomplished as follows: The gear is tak...

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

Heat Treatment Of Punches And Dies Shears Taps Etc
HEATING.--The degree to which tools of the above classes shou...

Process Of Carburizing
Carburizing imparts a shell of high-carbon content to a low-...

Lathe And Planer Tools
TO FORGE.--Gently warm the steel to remove any chill is parti...

Carburizing By Gas


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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