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Steel Making

Optical System And Electrical Circuit Of The Leeds & Northrup Optical Pyrometer
For extremely high temperature, the optical pyrometer is lar...

Leeds And Northrup Optical Pyrometer
The principles of this very popular method of measuring tempe...

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

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

Restoring Overheated Steel
The effect of heat treatment on overheated steel is shown gra...

Surface Carburizing
Carburizing, commonly called case-hardening, is the art of pr...

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

Annealing Of High-speed Steel
For annealing high-speed steel, some makers recommend using g...

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

Complete Calibration Of Pyrometers
For the complete calibration of a thermo-couple of unknown e...

Preventing Decarbonization Of Tool Steel
It is especially important to prevent decarbonization in such...

Quenching The Work
In some operations case-hardened work is quenched from the bo...

Quality And Structure
The quality of high-speed steel is dependent to a very great ...

Manganese
Manganese adds considerably to the tensile strength of steel,...

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

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

Instructions For Working High-speed Steel
Owing to the wide variations in the composition of high-speed...

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

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

Hardness Testing
The word hardness is used to express various properties of me...



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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