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Steel Making

Placing Of Pyrometers
When installing a pyrometer, care should be taken that it re...

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

Non-shrinking Oil-hardening Steels
Certain steels have a very low rate of expansion and contract...

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

Testing And Inspection Of Heat Treatment
The hard parts of the gear must be so hard that a new mill f...

Air-hardening Steels
These steels are recommended for boring, turning and planing...

Drop Forging Dies
The kind of steel used in the die of course influences the he...

Annealing
There is no mystery or secret about the proper annealing of d...

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

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

Properties Of Alloy Steels
The following table shows the percentages of carbon, manganes...

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

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

Connecting Rods
The material used for all connecting rods on the Liberty engi...

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

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

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

Separating The Work From The Compound
During the pulling of the heat, the pots are dumped upon a ca...

Sulphur
Sulphur is another impurity and high sulphur is even a greate...

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



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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