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Liberty Motor Connecting Rods
The requirements for materials for the Liberty motor connecti...

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

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

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

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

Effect Of Different Carburizing Material
[Illustrations: FIGS. 33 to 37.] Each of these different p...

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

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

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

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

Hints For Tool Steel Users
Do not hesitate to ask for information from the maker as to t...

The Influence Of Size
The size of the piece influences the physical properties obta...

High-chromium Or Rust-proof Steel
High-chromium, or what is called stainless steel containing f...

Properties Of Steel
Steels are known by certain tests. Early tests were more or l...

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

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

Oil-hardening Steel
Heat slowly and uniformly to 1,450 deg.F. and forge thorough...

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

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

Fatigue Tests
It has been known for fifty years that a beam or rod would fa...



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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