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Steel Making

Chrome-nickel Steel
Forging heat of chrome-nickel steel depends very largely on ...

Annealing Alloy Steel
The term alloy steel, from the steel maker's point of view, r...

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

Phosphorus
Phosphorus is one of the impurities in steel, and it has been...

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

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

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

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

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

Classifications Of Steel
Among makers and sellers, carbon tool-steels are classed by g...

Liberty Motor Connecting Rods
The requirements for materials for the Liberty motor connecti...

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

Effect Of Different Carburizing Material
[Illustrations: FIGS. 33 to 37.] Each of these different p...

Placing The Thermo-couples
The following illustrations from the Taylor Instrument Compan...

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

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

Pyrometers
Armor plate makers sometimes use the copper ball or Siemens' ...

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

Fatigue Tests
It has been known for fifty years that a beam or rod would fa...

Lathe And Planer Tools
FORGING.--Gently warm the steel to remove any chill, is parti...



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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