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Pyrometers For Molten Metal
Pyrometers for molten metal are connected to portable thermoc...

Gas Consumption For Carburizing
Although the advantages offered by the gas-fired furnace for ...

Temperature For Annealing
Theoretically, annealing should be accomplished at a tempera...

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

Quenching Tool Steel
To secure proper hardness, the cooling of quenching of steel ...

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

Flange Shields For Furnaces
Such portable flame shields as the one illustrated in Fig. 1...

Complete Calibration Of Pyrometers
For the complete calibration of a thermo-couple of unknown e...

Annealing Work
With the exception of several of the higher types of alloy s...

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

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

Rate Of Cooling
At the option of the manufacturer, the above treatment of gea...

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

Chrome-nickel Steel
Forging heat of chrome-nickel steel depends very largely on ...

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

Composition Of Transmission-gear Steel
If the nickel content of this steel is eliminated, and the pe...

Lathe And Planer Tools
TO FORGE.--Gently warm the steel to remove any chill is parti...

Protective Screens For Furnaces
Workmen needlessly exposed to the flames, heat and glare from...

Case-hardening Treatments For Various Steels
Plain water, salt water and linseed oil are the three most co...

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



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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