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The Thermo-couple
With the application of the thermo-couple, the measurement of...

Preventing Cracks In Hardening
The blacksmith in the small shop, where equipment is usually ...

The Leeds And Northrup Potentiometer System
The potentiometer pyrometer system is both flexible and subst...

Cutting-off Steel From Bar
To cut a piece from an annealed bar, cut off with a hack saw,...

Annealing Of High-speed Steel
For annealing high-speed steel, some makers recommend using g...

The Modern Hardening Room
A hardening room of today means a very different place from ...

For Milling Cutters And Formed Tools
FORGING.--Forge as before.--ANNEALING.--Place the steel in a ...

Tempering Colors On Carbon Steels
Opinions differ as to the temperature which is indicated by t...

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

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

Protective Screens For Furnaces
Workmen needlessly exposed to the flames, heat and glare from...

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

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

Correction For Cold-junction Errors
The voltage generated by a thermo-couple of an electric pyrom...

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

Ebbw Vale And The Bessemer Process
After his British Association address in August 1856, Besseme...

Critical Points
One of the most important means of investigating the properti...

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

Crankshaft
The crankshaft was the most highly stressed part of the entir...

Corrosion
This steel like any other steel when distorted by cold worki...



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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