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Steel Making

The Effect Of Tempering On Water-quenched Gages
The following information has been supplied by Automatic and ...

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

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

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

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

S A E Heat Treatments
The Society of Automotive Engineers have adopted certain heat...

High Speed Steel
For centuries the secret art of making tool steel was handed ...

Heat Treatment Of Gear Blanks
This section is based on a paper read before the American Gea...

Annealing Work
With the exception of several of the higher types of alloy s...

Affinity Of Nickel Steel For Carbon
The carbon- and nickel-steel gears are carburized separately...

Application To The Automotive Industry
The information given on the various parts of the Liberty eng...

Hardness Testing
The word hardness is used to express various properties of me...

High-chromium Or Rust-proof Steel
High-chromium, or what is called stainless steel containing f...

Restoring Overheated Steel
The effect of heat treatment on overheated steel is shown gra...

Process Of Carburizing
Carburizing imparts a shell of high-carbon content to a low-...

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

Heat Treatment Of Axles
Parts of this general type should be heat-treated to show the...

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

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

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



Heat-treating Department






Category: HEAT TREATMENT OF STEEL

The heat-treating department occupies an
L-shaped building. The design is very practical, with the furnace
and the floor on the same level so that there is no lifting of
heavy pots. Fuel oil is used in all the furnaces and gives highly
satisfactory results. The consumption of fuel oil is about 2 gal.
per hour per furnace.

The work is packed in the pots in a room at the entrance to the
heat-treatment building. Before packing, each gear is stamped with
a number which is a key to the records of the analysis and complete
heat treatment of that particular gear. Should a question at any time
arise regarding the treatment of a certain gear, all the necessary
information is available if the number on the gear is legible. For
instance, date of treatment, furnace, carburizing material, position
of the pot in the furnace, position of gear in pot, temperature of
furnace and duration of treatment are all tabulated and filed for
reference.

After marking, all holes and parts which are to remain uncarburized
are plugged or luted with a mixture of kaolin and Mellville gravel
clay, and the gear is packed in the carburizing material. Bohnite,
a commercial carburizing compound is used exclusively at this plant.
This does excellent work and is economical. Broadly speaking, the
economy of a carburizing compound depends on its lightness. The
space not occupied by work must be filled with compound; therefore)
other things being equal, a compound weighing 25 lb. would be worth
more than twice as much as one weighing 60 lb. per cubic foot. It
has been claimed that certain compounds can be used over and over
again, but this is only true in a limited way, if good work is
required. There is, of course, some carbon in the compound after
the first use, but for first-class work, new compound must be used
each time.





Next: The Packing Department

Previous: Annealing Method



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