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   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

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

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

Detrimental Elements
Sulphur and phosphorus are two elements known to be detrimen...

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

Carburizing By Gas
The process of carburizing by gas, briefly mentioned on page ...

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

Annealing In Bone
Steel and cast iron may both be annealed in granulated bone. ...

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

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

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

Robert Mushet
Robert (Forester) Mushet (1811-1891), born in the Forest of D...

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

Quality And Structure
The quality of high-speed steel is dependent to a very great ...

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

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

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

Correction For Cold-junction Errors
The voltage generated by a thermo-couple of an electric pyrom...

The Thermo-couple
With the application of the thermo-couple, the measurement of...

Annealing Alloy Steel
The term alloy steel, from the steel maker's point of view, r...

Preventing Carburizing By Copper-plating
Copper-plating has been found effective and must have a thick...



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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