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Steel Making

Heat-treating Department
The heat-treating department occupies an L-shaped building. ...

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

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

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

Preparing Parts For Local Case-hardening
At the works of the Dayton Engineering Laboratories Company, ...

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

Sulphur
SULPHUR is another element (symbol S) which is always found i...

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

Mushet And Bessemer
That Mushet was "used" by Ebbw Vale against Bessemer is, perh...

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

Complete Calibration Of Pyrometers
For the complete calibration of a thermo-couple of unknown e...

Affinity Of Nickel Steel For Carbon
The carbon- and nickel-steel gears are carburized separately...

Manganese
MANGANESE is a metal much like iron. Its chemical symbol is M...

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

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

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

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

Impact Tests
Impact tests are of considerable importance as an indication ...

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

An Automatic Temperature Control Pyrometer
Automatic temperature control instruments are similar to the ...



The Effect






Category: HEAT TREATMENT OF STEEL

The heating at 1,600 deg.F. gives the first heat treatment
which refines the core, which under the former high heat (1,700 deg.F.)
was rendered coarsely crystalline. All the gears, including the
scrap gears, are quenched direct from the pot in this manner.

The gears then go to the reheating furnaces, situated in front of
a battery of Gleason quenching machines. These furnaces accommodate
from 12 to 16 crown gears. The carbon-steel gears are heated in a
reducing atmosphere to about 1,425 deg.F. (depending on the carbon
content) placed in the dies in the Gleason quenching machine, and
quenched between dies in mineral oil at less than 100 deg.F. The test
gear receives exactly the same treatment as the others and is then
broken, giving a record of the condition of both case and core.





Next: Affinity Of Nickel Steel For Carbon

Previous: Short Method Of Treatment



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