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Steel Making

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

Introduction Of Carbon
The matter to which these notes are primarily directed is the...

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

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

Crankshaft
The crankshaft was the most highly stressed part of the entir...

Judging The Heat Of Steel
While the use of a pyrometer is of course the only way to hav...

High-carbon Machinery Steel
The carbon content of this steel is above 30 points and is ha...

Carbon-steel Forgings
Low-stressed, carbon-steel forgings include such parts as car...

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

Crucible Steel
Crucible steel is still made by melting material in a clay or...

Carburizing By Gas
The process of carburizing by gas, briefly mentioned on page ...

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

Carbon In Tool Steel
Carbon tool steel, or tool steel as it is commonly called, us...

Molybdenum
Molybdenum steels have been made commercially for twenty-five...

Tungsten
Tungsten, as an alloy in steel, has been known and used for a...

Chromium
Chromium when alloyed with steel, has the characteristic func...

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

Detrimental Elements
Sulphur and phosphorus are two elements known to be detrimen...

Instructions For Working High-speed Steel
Owing to the wide variations in the composition of high-speed...

Annealing
There is no mystery or secret about the proper annealing of d...



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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