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Steel Making

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

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

Compensating Leads
By the use of compensating leads, formed of the same materia...

The Quenching Tank
The quenching tank is an important feature of apparatus in c...

Application Of Liberty Engine Materials To The Automotive Industry
The success of the Liberty engine program was an engineer...

Lathe And Planer Tools
TO FORGE.--Gently warm the steel to remove any chill is parti...

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

Temperatures To Use
As soon as the temperature of the steel reaches 100 deg.C. (...

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

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

Making Steel Balls
Steel balls are made from rods or coils according to size, st...

The Care Of Carburizing Compounds
Of all the opportunities for practicing economy in the heat-t...

Knowing What Takes Place
How are we to know if we have given a piece of steel the ver...

Chrome-nickel Steel
Forging heat of chrome-nickel steel depends very largely on ...

Steel Can Be Worked Cold
As noted above, steel can be worked cold, as in the case of ...

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

Alloying Elements
Commercial steels of even the simplest types are therefore p...

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

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

Plant For Forging Rifle Barrels
The forging of rifle barrels in large quantities and heat-tre...



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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