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Steel Making

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

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

Vanadium
Vanadium has a very marked effect upon alloy steels rich in c...

Restoring Overheated Steel
The effect of heat treatment on overheated steel is shown gra...

Heavy Forging Practice
In heavy forging practice where the metal is being worked at...

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

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

Carburizing Material
The simplest carburizing substance is charcoal. It is also th...

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

The Effect Of Tempering On Water-quenched Gages
The following information has been supplied by Automatic and ...

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

Annealing
There is no mystery or secret about the proper annealing of d...

High-carbon Machinery Steel
The carbon content of this steel is above 30 points and is ha...

Nickel
Nickel may be considered as the toughest among the non-rare a...

Typical Oil-fired Furnaces
Several types of standard oil-fired furnaces are shown herew...

Furnace Data
In order to give definite information concerning furnaces, fu...

Carbon-steel Forgings
Low-stressed, carbon-steel forgings include such parts as car...

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

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

Care In Annealing
Not only will benefits in machining be found by careful anne...



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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