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Heat Treatment Of Milling Cutters Drills Reamers Etc
THE FIRE.--Gas and electric furnaces designed for high heats ...

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

Rate Of Cooling
At the option of the manufacturer, the above treatment of gea...

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

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

Phosphorus
Phosphorus is one of the impurities in steel, and it has been...

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

Protectors For Thermo-couples
Thermo-couples must be protected from the danger of mechanica...

Annealing In Bone
Steel and cast iron may both be annealed in granulated bone. ...

Heavy Forging Practice
In heavy forging practice where the metal is being worked at...

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

Temperature Recording And Regulation
Each furnace is equipped with pyrometers, but the reading an...

Phosphorus
PHOSPHORUS is an element (symbol P) which enters the metal fr...

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

Placing Of Pyrometers
When installing a pyrometer, care should be taken that it re...

Suggestions For Handling High-speed Steels
The following suggestions for handling high-speed steels are ...

High-carbon Machinery Steel
The carbon content of this steel is above 30 points and is ha...

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

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

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



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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