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

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

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

Open Hearth Process
The open hearth furnace consists of a big brick room with a l...

Phosphorus
PHOSPHORUS is an element (symbol P) which enters the metal fr...

The Theory Of Tempering
Steel that has been hardened is generally harder and more br...

Gears
The material used for all gears on the Liberty engine was sel...

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

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

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

Cutting-off Steel From Bar
To cut a piece from an annealed bar, cut off with a hack saw,...

Hardening High-speed Steel
In forging use coke for fuel in the forge. Heat steel slowly ...

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

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

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

Flange Shields For Furnaces
Such portable flame shields as the one illustrated in Fig. 1...

Silicon
SILICON is a very widespread element (symbol Si), being an es...

The Packing Department
In Fig. 56 is shown the packing pots where the work is packe...

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

Brown Automatic Signaling Pyrometer
In large heat-treating plants it has been customary to mainta...



The Penetration Of Carbon






Category: CASE-HARDENING OR SURFACE-CARBURIZING

Carburized mild steel is used to a great extent in the manufacture
of automobile and other parts which are likely to be subjected to
rough usage. The strength and ability to withstand hard knocks
depend to a very considerable degree on the thoroughness with which
the carburizing process is conducted.

Many automobile manufacturers have at one time or another passed
through a period of unfortunate breakages, or have found that for
a certain period the parts turned out of their hardening shops
were not sufficiently hard to enable the rubbing surfaces to stand
up against the pressure to which they were subjected.

So many factors govern the success of hardening that often this
succession of bad work has been actually overcome without those
interested realizing what was the weak point in their system of
treatment. As the question is one that can create a bad reputation
for the product of any firm it is well to study the influential
factors minutely.





Next: Introduction Of Carbon

Previous: Preparing Parts For Local Case-hardening



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