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Steel Making

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

Temperature For Annealing
Theoretically, annealing should be accomplished at a tempera...

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

Gas Consumption For Carburizing
Although the advantages offered by the gas-fired furnace for ...

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

Hardening High-speed Steels
We will now take up the matter of hardening high-speed steels...

Hardening Carbon Steel For Tools
For years the toolmaker had full sway in regard to make of st...

Steel Worked In Austenitic State
As a general rule steel should be worked when it is in the a...

Machineability
Reheating for machine ability was done at 100 deg. less than ...

Effects Of Proper Annealing
Proper annealing of low-carbon steels causes a complete solu...

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

The Effect Of Tempering On Water-quenched Gages
The following information has been supplied by Automatic and ...

William Kelly's Air-boiling Process
An account of Bessemer's address to the British Association w...

Annealing To Relieve Internal Stresses
Work quenched from a high temperature and not afterward tempe...

Annealing Of Rifle Components At Springfield Armory
In general, all forgings of the components of the arms manufa...

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

Quality And Structure
The quality of high-speed steel is dependent to a very great ...

Annealing Method
Forgings which are too hard to machine are put in pots with ...

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

Open Hearth Process
The open hearth furnace consists of a big brick room with a l...



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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