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Heat Treatment Of Steel
Heat treatment consists in heating and cooling metal at defin...

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

Pyrometers
Armor plate makers sometimes use the copper ball or Siemens' ...

Carbon-steel Forgings
Low-stressed, carbon-steel forgings include such parts as car...

Chromium
Chromium when alloyed with steel, has the characteristic func...

Using Illuminating Gas
The choice of a carburizing furnace depends greatly on the fa...

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

Nickel-chromium
A combination of the characteristics of nickel and the charac...

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

Heat Treatment Of Lathe Planer And Similar Tools
FIRE.--For these tools a good fire is one made of hard foundr...

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

Furnace Data
In order to give definite information concerning furnaces, fu...

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

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

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

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

Heat Treatment Of Milling Cutters Drills Reamers Etc
THE FIRE.--Gas and electric furnaces designed for high heats ...

Classifications Of Steel
Among makers and sellers, carbon tool-steels are classed by g...

Calibration Of Pyrometer With Common Salt
An easy and convenient method for standardization and one whi...

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



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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