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Steel Making

Annealing
ANNEALING can be done by heating to temperatures ranging from...

Process Of Carburizing
Carburizing imparts a shell of high-carbon content to a low-...

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

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

Annealing Of High-speed Steel
For annealing high-speed steel, some makers recommend using g...

Alloying Elements
Commercial steels of even the simplest types are therefore p...

The Thermo-couple
With the application of the thermo-couple, the measurement of...

Surface Carburizing
Carburizing, commonly called case-hardening, is the art of pr...

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

Temperatures To Use
As soon as the temperature of the steel reaches 100 deg.C. (...

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

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

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

Hardness Testing
The word hardness is used to express various properties of me...

Heating
Although it is possible to work steels cold, to an extent de...

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

Separating The Work From The Compound
During the pulling of the heat, the pots are dumped upon a ca...

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

Critical Points
One of the most important means of investigating the properti...

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



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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