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Steel Making

Heat-treating Equipment And Methods For Mass Production
The heat-treating department of the Brown-Lipe-Chapin Company...

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

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

Steel Before The 1850's
In spite of a rapid increase in the use of machines and the ...

The Influence Of Size
The size of the piece influences the physical properties obta...

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

Pyrometry And Pyrometers
A knowledge of the fundamental principles of pyrometry, or th...

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

A Chromium-cobalt Steel
The Latrobe Steel Company make a high-speed steel without tun...

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

Tensile Properties
Strength of a metal is usually expressed in the number of pou...

Preventing Carburizing By Copper-plating
Copper-plating has been found effective and must have a thick...

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

Mushet And Bessemer
That Mushet was "used" by Ebbw Vale against Bessemer is, perh...

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

Short Method Of Treatment
In the new method, the packed pots are run into the case-har...

Vanadium
Vanadium has a very marked effect upon alloy steels rich in c...

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

Making Steel Balls
Steel balls are made from rods or coils according to size, st...

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