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Steel Making

Using Illuminating Gas
The choice of a carburizing furnace depends greatly on the fa...

Pyrometers For Molten Metal
Pyrometers for molten metal are connected to portable thermoc...

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

Optical System And Electrical Circuit Of The Leeds & Northrup Optical Pyrometer
For extremely high temperature, the optical pyrometer is lar...

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

Chrome-nickel Steel
Forging heat of chrome-nickel steel depends very largely on ...

A Satisfactory Luting Mixture
A mixture of fireclay and sand will be found very satisfactor...

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

Blending The Compound
Essentially, this consists of the sturdy, power-driven separa...

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

Manganese
Manganese adds considerably to the tensile strength of steel,...

Quenching Tool Steel
To secure proper hardness, the cooling of quenching of steel ...

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

Hardening
The forgings can be hardened by cooling in still air or quen...

Robert Mushet
Robert (Forester) Mushet (1811-1891), born in the Forest of D...

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

Heat Treatment Of Lathe Planer And Similar Tools
FIRE.--For these tools a good fire is one made of hard foundr...

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

Cyanide Bath For Tool Steels
All high-carbon tool steels are heated in a cyanide bath. Wi...

Non-shrinking Oil-hardening Steels
Certain steels have a very low rate of expansion and contract...



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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