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Steel Making

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

Forging High-speed Steel
Heat very slowly and carefully to from 1,800 to 2,000 deg.F....

The Penetration Of Carbon
Carburized mild steel is used to a great extent in the manufa...

Composition And Properties Of Steel
It is a remarkable fact that one can look through a dozen tex...

Heat Treatment Of Milling Cutters Drills Reamers Etc
THE FIRE.--Gas and electric furnaces designed for high heats ...

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

Rate Of Absorption
According to Guillet, the absorption of carbon is favored by ...

Heat Treatment Of Axles
Parts of this general type should be heat-treated to show the...

Effect Of A Small Amount Of Copper In Medium-carbon Steel
This shows the result of tests by C. R. Hayward and A. B. Joh...

Leeds And Northrup Optical Pyrometer
The principles of this very popular method of measuring tempe...

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

Protective Screens For Furnaces
Workmen needlessly exposed to the flames, heat and glare from...

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

Refining The Grain
This is remedied by reheating the piece to a temperature slig...

Connecting Rods
The material used for all connecting rods on the Liberty engi...

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

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

Application Of Liberty Engine Materials To The Automotive Industry
The success of the Liberty engine program was an engineer...

Testing And Inspection Of Heat Treatment
The hard parts of the gear must be so hard that a new mill f...

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



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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