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   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

Properties Of Alloy Steels
The following table shows the percentages of carbon, manganes...

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

The Electric Process
The fourth method of manufacturing steel is by the electric f...

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

Care In Annealing
Not only will benefits in machining be found by careful anne...

Flange Shields For Furnaces
Such portable flame shields as the one illustrated in Fig. 1...

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

Standard Analysis
The selection of a standard analysis by the manufacturer is t...

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

Preventing Decarbonization Of Tool Steel
It is especially important to prevent decarbonization in such...

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

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

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

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

Conclusions
Martien was probably never a serious contender for the honor ...

The Forging Of Steel
So much depends upon the forging of steel that this operation...

The Care Of Carburizing Compounds
Of all the opportunities for practicing economy in the heat-t...

Properties Of Steel
Steels are known by certain tests. Early tests were more or l...

Rate Of Absorption
According to Guillet, the absorption of carbon is favored by ...

Bessemer Process
The bessemer process consists of charging molten pig iron int...



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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