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Steel Making

Open Hearth Process
The open hearth furnace consists of a big brick room with a l...

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

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

Preventing Cracks In Hardening
The blacksmith in the small shop, where equipment is usually ...

An Automatic Temperature Control Pyrometer
Automatic temperature control instruments are similar to the ...

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

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

Annealing Of Rifle Components At Springfield Armory
In general, all forgings of the components of the arms manufa...

Impact Tests
Impact tests are of considerable importance as an indication ...

Hardening
The forgings can be hardened by cooling in still air or quen...

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

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

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

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

Sulphur
SULPHUR is another element (symbol S) which is always found i...

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

Carbon Tool Steel
Heat to a bright red, about 1,500 to 1,550 deg.F. Do not ham...

Hardening Carbon Steel For Tools
For years the toolmaker had full sway in regard to make of st...

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

Tungsten
Tungsten, as an alloy in steel, has been known and used for a...



Quenching The Work






Category: CASE-HARDENING OR SURFACE-CARBURIZING

In some operations case-hardened work is quenched from the box by
dumping the whole contents into the quenching tank. It is common
practice to leave a sieve or wire basket to catch the work, allowing
the carburizing material to fall to the bottom of the tank where it
can be recovered later and used again as a part of a new mixture.
For best results, however, the steel is allowed to cool down slowly
in the box after which it is removed and hardened by heating and
quenching the same as carbon steel of the same grade. It has absorbed
sufficient carbon so that, in the outer portions at least, it is
a high-carbon steel.





Next: The Quenching Tank

Previous: Effect Of Different Carburizing Material



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