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Steel Making

Tool Or Crucible Steel
Crucible steel can be annealed either in muffled furnace or b...

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

The Leeds And Northrup Potentiometer System
The potentiometer pyrometer system is both flexible and subst...

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

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

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

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

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

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

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

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

Sulphur
Sulphur is another impurity and high sulphur is even a greate...

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

Protectors For Thermo-couples
Thermo-couples must be protected from the danger of mechanica...

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

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

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

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

Drop Forging Dies
The kind of steel used in the die of course influences the he...

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



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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