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Steel Making

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

Manganese
MANGANESE is a metal much like iron. Its chemical symbol is M...

S A E Heat Treatments
The Society of Automotive Engineers have adopted certain heat...

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

For Milling Cutters And Formed Tools
FORGING.--Forge as before.--ANNEALING.--Place the steel in a ...

Properties Of Steel
Steels are known by certain tests. Early tests were more or l...

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

The Theory Of Tempering
Steel that has been hardened is generally harder and more br...

Using Illuminating Gas
The choice of a carburizing furnace depends greatly on the fa...

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

Gears
The material used for all gears on the Liberty engine was sel...

Knowing What Takes Place
How are we to know if we have given a piece of steel the ver...

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

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

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

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

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

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

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

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



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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