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Bessemer Process
The bessemer process consists of charging molten pig iron int...

Application To The Automotive Industry
The information given on the various parts of the Liberty eng...

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

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

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

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

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

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

Heat Treatment Of Milling Cutters Drills Reamers Etc
THE FIRE.--Gas and electric furnaces designed for high heats ...

Take Time For Hardening
Uneven heating and poor quenching has caused loss of many ve...

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

The Care Of Carburizing Compounds
Of all the opportunities for practicing economy in the heat-t...

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

Tool Or Crucible Steel
Crucible steel can be annealed either in muffled furnace or b...

Placing The Thermo-couples
The following illustrations from the Taylor Instrument Compan...

Quenching
It is considered good practice to quench alloy steels from th...

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

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

Liberty Motor Connecting Rods
The requirements for materials for the Liberty motor connecti...

Brown Automatic Signaling Pyrometer
In large heat-treating plants it has been customary to mainta...



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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