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

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

Annealing Alloy Steel
The term alloy steel, from the steel maker's point of view, r...

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

Hardening
Steel is hardened by quenching from above the upper critical....

Blending The Compound
Essentially, this consists of the sturdy, power-driven separa...

Double Annealing
Water annealing consists in heating the piece, allowing it to...

Heating Of Manganese Steel
Another form of heat-treating furnace is that which is used ...

Flange Shields For Furnaces
Such portable flame shields as the one illustrated in Fig. 1...

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

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

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

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

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

Properties Of Alloy Steels
The following table shows the percentages of carbon, manganes...

Heat Treatment Of Steel
Heat treatment consists in heating and cooling metal at defin...

Composition Of Transmission-gear Steel
If the nickel content of this steel is eliminated, and the pe...

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

Conclusions
Martien was probably never a serious contender for the honor ...

Carburizing By Gas
The process of carburizing by gas, briefly mentioned on page ...



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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