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Steel Making

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

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

Nickel
Nickel may be considered as the toughest among the non-rare a...

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

Heat-treating Equipment And Methods For Mass Production
The heat-treating department of the Brown-Lipe-Chapin Company...

Steel Worked In Austenitic State
As a general rule steel should be worked when it is in the a...

Correction By Zero Adjustment
Many pyrometers are supplied with a zero adjuster, by means ...

The Modern Hardening Room
A hardening room of today means a very different place from ...

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

Blending The Compound
Essentially, this consists of the sturdy, power-driven separa...

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

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

Tempering Round Dies
A number of circular dies of carbon tool steel for use in too...

Hardening
Steel is hardened by quenching from above the upper critical....

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

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

Pyrometry And Pyrometers
A knowledge of the fundamental principles of pyrometry, or th...

Properties Of Steel
Steels are known by certain tests. Early tests were more or l...

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

Surface Carburizing
Carburizing, commonly called case-hardening, is the art of pr...



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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