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Steel Making

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

Annealing Work
With the exception of several of the higher types of alloy s...

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

Preventing Decarbonization Of Tool Steel
It is especially important to prevent decarbonization in such...

Care In Annealing
Not only will benefits in machining be found by careful anne...

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

Short Method Of Treatment
In the new method, the packed pots are run into the case-har...

Correction By Zero Adjustment
Many pyrometers are supplied with a zero adjuster, by means ...

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

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

The Penetration Of Carbon
Carburized mild steel is used to a great extent in the manufa...

A Chromium-cobalt Steel
The Latrobe Steel Company make a high-speed steel without tun...

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

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

Carburizing Low-carbon Sleeves
Low-carbon sleeves are carburized and pushed on malleable-ir...

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

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

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

The Packing Department
In Fig. 56 is shown the packing pots where the work is packe...

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



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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