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Steel Making

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

The Pyrometer And Its Use
In the heat treatment of steel, it has become absolutely nece...

Quenching The Work
In some operations case-hardened work is quenched from the bo...

Manganese
MANGANESE is a metal much like iron. Its chemical symbol is M...

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

Ebbw Vale And The Bessemer Process
After his British Association address in August 1856, Besseme...

Care In Annealing
Not only will benefits in machining be found by careful anne...

Silicon
Silicon prevents, to a large extent, defects such as gas bubb...

Conclusions
Martien was probably never a serious contender for the honor ...

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...

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

Judging The Heat Of Steel
While the use of a pyrometer is of course the only way to hav...

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

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

Double Annealing
Water annealing consists in heating the piece, allowing it to...

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

Impact Tests
Impact tests are of considerable importance as an indication ...

Plant For Forging Rifle Barrels
The forging of rifle barrels in large quantities and heat-tre...

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



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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