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Steel Making

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

SULPHUR is another element (symbol S) which is always found i...

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

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

Temperature Recording And Regulation
Each furnace is equipped with pyrometers, but the reading an...

Crucible Steel
Crucible steel is still made by melting material in a clay or...

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

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

Carburizing Low-carbon Sleeves
Low-carbon sleeves are carburized and pushed on malleable-ir...

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

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

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

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

The Leeds And Northrup Potentiometer System
The potentiometer pyrometer system is both flexible and subst...

Annealing Method
Forgings which are too hard to machine are put in pots with ...

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

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

Effects Of Proper Annealing
Proper annealing of low-carbon steels causes a complete solu...

William Kelly's Air-boiling Process
An account of Bessemer's address to the British Association w...

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

Separating The Work From The Compound


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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