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

The Forging Of Steel
So much depends upon the forging of steel that this operation...

Tempering Colors On Carbon Steels
Opinions differ as to the temperature which is indicated by t...

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

High-chromium Or Rust-proof Steel
High-chromium, or what is called stainless steel containing f...

Correction By Zero Adjustment
Many pyrometers are supplied with a zero adjuster, by means ...

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

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

Heating
Although it is possible to work steels cold, to an extent de...

Piston Pin
The piston pin on an aviation engine must possess maximum res...

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

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

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

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

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

Annealing Of High-speed Steel
For annealing high-speed steel, some makers recommend using g...

Annealing Method
Forgings which are too hard to machine are put in pots with ...

Pyrometers
Armor plate makers sometimes use the copper ball or Siemens' ...

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

High Speed Steel
For centuries the secret art of making tool steel was handed ...



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.





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