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

The Packing Department
In Fig. 56 is shown the packing pots where the work is packe...

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

The Electric Process
The fourth method of manufacturing steel is by the electric f...

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

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

Forging High-speed Steel
Heat very slowly and carefully to from 1,800 to 2,000 deg.F....

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

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

Preparing Parts For Local Case-hardening
At the works of the Dayton Engineering Laboratories Company, ...

Hardening Operation
Hardening a gear is accomplished as follows: The gear is tak...

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

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

The Penetration Of Carbon
Carburized mild steel is used to a great extent in the manufa...

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

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

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

Silicon
SILICON is a very widespread element (symbol Si), being an es...

Oil-hardening Steel
Heat slowly and uniformly to 1,450 deg.F. and forge thorough...

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



Separating The Work From The Compound






Category: CASE-HARDENING OR SURFACE-CARBURIZING

During the pulling of the heat, the pots are dumped upon a cast-iron
screen which forms a table or apron for the furnace. Directly beneath
this table is located one of the steel conveyor carts, shown in Fig.
43, which is provided with two wheels at the rear and a dolly clevis
at the front, which allows it to be hauled away from beneath the
furnace apron while filled with red-hot compound. A steel cover is
provided for each box, and the material is allowed to cool without
losing much of the evolved gases which are still being thrown off
by the compound.




As this compound comes from the carburizing pots it contains bits
of fireclay which represent a part of the luting used for sealing,
and there may be small parts of work or bits of fused material
in it as well. After cooling, the compound is very dusty and
disagreeable to handle, and, before it can be used again, must be
sifted, cleaned and blended.

Some time ago the writer was confronted with this proposition for
one of the largest consumers of carburizing compound in the world,
and the problem was handled in the following manner: The cooled
compound was dumped from the cooling cars and sprinkled with a
low-grade oil which served the dual purposes of settling the dust
and adding a certain percentage of valuable hydrocarbon to the
compound. In Fig. 44 is shown the machine that was designed to do
the cleaning and blending.





Next: Blending The Compound

Previous: The Care Of Carburizing Compounds



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