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Steel Making

Shrinking And Enlarging Work
Steel can be shrunk or enlarged by proper heating and cooling...

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

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

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

Critical Points
One of the most important means of investigating the properti...

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

Carbon Steels For Different Tools
All users of tool steels should carefully study the different...

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

Heat Treatment Of Punches And Dies Shears Taps Etc
HEATING.--The degree to which tools of the above classes shou...

Preventing Cracks In Hardening
The blacksmith in the small shop, where equipment is usually ...

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

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

Composition And Properties Of Steel
It is a remarkable fact that one can look through a dozen tex...

Hardening
The forgings can be hardened by cooling in still air or quen...

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

Hardening
Steel is hardened by quenching from above the upper critical....

The Pyrometer And Its Use
In the heat treatment of steel, it has become absolutely nece...

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

Hardening High-speed Steels
We will now take up the matter of hardening high-speed steels...

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



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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