It is very important at the outset to consider the qualities of this very important line. In some hands it is broad and shallow on the surface of the hand, in others it is deep and fine; the appearance of this line is very often deceptive, and ... Read more of The Line Of Life at Palm Readings.orgInformational Site Network Informational
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Steel Making

Conclusions
Martien was probably never a serious contender for the honor ...

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

Cutting-off Steel From Bar
To cut a piece from an annealed bar, cut off with a hack saw,...

Affinity Of Nickel Steel For Carbon
The carbon- and nickel-steel gears are carburized separately...

Suggestions For Handling High-speed Steels
The following suggestions for handling high-speed steels are ...

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

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

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

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

The Quenching Tank
The quenching tank is an important feature of apparatus in c...

Preparing Parts For Local Case-hardening
At the works of the Dayton Engineering Laboratories Company, ...

Hardening High-speed Steel
In forging use coke for fuel in the forge. Heat steel slowly ...

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

Hints For Tool Steel Users
Do not hesitate to ask for information from the maker as to t...

Hardening Operation
Hardening a gear is accomplished as follows: The gear is tak...

Annealing To Relieve Internal Stresses
Work quenched from a high temperature and not afterward tempe...

Carburizing Low-carbon Sleeves
Low-carbon sleeves are carburized and pushed on malleable-ir...

Steel Can Be Worked Cold
As noted above, steel can be worked cold, as in the case of ...

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

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



Carburizing By Gas






Category: CASE-HARDENING OR SURFACE-CARBURIZING

The process of carburizing by gas, briefly mentioned on page 88,
consists of having a slowly revolving, properly heated, cylindrical
retort into which illuminating gas (a mixture of various hydrocarbons)
is continuously injected under pressure. The spent gases are vented
to insure the greatest speed in carbonizing. The work is constantly
and uniformly exposed to a clean carbonizing atmosphere instead
of partially spent carbonaceous solids which may give off very
complex compounds of phosphorus, sulphur, carbon and nitrogen.

Originally this process was thought to require a gas generator but
it has been discovered that city gas works all right. The gas consists
of vapors derived from petroleum or bituminous coal. Sometimes the
gas supply is diluted by air, to reduce the speed of carburization
and increase the depth.





Next: Preventing Carburizing By Copper-plating

Previous: Case-hardening Treatments For Various Steels



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