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Steel Making

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

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

Suggestions For Handling High-speed Steels
The following suggestions for handling high-speed steels are ...

Heat-treating Department
The heat-treating department occupies an L-shaped building. ...

Heating Of Manganese Steel
Another form of heat-treating furnace is that which is used ...

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

Air-hardening Steels
These steels are recommended for boring, turning and planing...

Phosphorus
Phosphorus is one of the impurities in steel, and it has been...

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

The Electric Process
The fourth method of manufacturing steel is by the electric f...

High-carbon Machinery Steel
The carbon content of this steel is above 30 points and is ha...

Annealing In Bone
Steel and cast iron may both be annealed in granulated bone. ...

Tensile Properties
Strength of a metal is usually expressed in the number of pou...

Quenching
It is considered good practice to quench alloy steels from th...

Highly Stressed Parts
The highly stressed parts on the Liberty engine consisted of ...

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

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

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

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

Temperature Recording And Regulation
Each furnace is equipped with pyrometers, but the reading an...



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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