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Introduction Of Carbon
The matter to which these notes are primarily directed is the...

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

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

Calibration Of Pyrometer With Common Salt
An easy and convenient method for standardization and one whi...

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

Restoring Overheated Steel
The effect of heat treatment on overheated steel is shown gra...

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

Annealing To Relieve Internal Stresses
Work quenched from a high temperature and not afterward tempe...

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

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

Carbon Steels For Different Tools
All users of tool steels should carefully study the different...

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

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

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

Hardening Carbon Steel For Tools
For years the toolmaker had full sway in regard to make of st...

Detrimental Elements
Sulphur and phosphorus are two elements known to be detrimen...

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

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

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

Hardening
The forgings can be hardened by cooling in still air or quen...



Affinity Of Nickel Steel For Carbon






Category: HEAT TREATMENT OF STEEL

The carbon- and nickel-steel
gears are carburized separately owing to the difference in time
necessary for their carburization. Practically all printed information
on the subject is to the effect that nickel steel takes longer to
carburize than plain carbon steel. This is directly opposed to
the conditions found at this plant. For the same depth of case,
other conditions being equal, a nickel-steel gear would require
from 20 to 30 min. less than a low carbon-steel gear.

From the quenching machines, the gears go to the sand-blasting
machines, situated in the wing of the heat-treating building, where
they are cleaned. From here they are taken to the testing department.
The tests are simple and at the same time most thorough.





Next: Testing And Inspection Of Heat Treatment

Previous: The Effect



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