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

Manganese
Manganese adds considerably to the tensile strength of steel,...

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

Furnace Data
In order to give definite information concerning furnaces, fu...

Suggestions For Handling High-speed Steels
The following suggestions for handling high-speed steels are ...

The Influence Of Size
The size of the piece influences the physical properties obta...

Cutting-off Steel From Bar
To cut a piece from an annealed bar, cut off with a hack saw,...

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

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

Standard Analysis
The selection of a standard analysis by the manufacturer is t...

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

Critical Points
One of the most important means of investigating the properti...

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

The Effect
The heating at 1,600 deg.F. gives the first heat treatment w...

Annealing Of Rifle Components At Springfield Armory
In general, all forgings of the components of the arms manufa...

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

Shrinking And Enlarging Work
Steel can be shrunk or enlarged by proper heating and cooling...

Highly Stressed Parts
The highly stressed parts on the Liberty engine consisted of ...

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

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



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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