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Steel Making

Steel Before The 1850's
In spite of a rapid increase in the use of machines and the ...

Carburizing Material
The simplest carburizing substance is charcoal. It is also th...

Steel Worked In Austenitic State
As a general rule steel should be worked when it is in the a...

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

Heat-treating Equipment And Methods For Mass Production
The heat-treating department of the Brown-Lipe-Chapin Company...

Annealing Alloy Steel
The term alloy steel, from the steel maker's point of view, r...

Tempering Round Dies
A number of circular dies of carbon tool steel for use in too...

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

Hardening Carbon Steel For Tools
For years the toolmaker had full sway in regard to make of st...

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

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

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 ...

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

Corrosion
This steel like any other steel when distorted by cold worki...

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

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

Silicon
Silicon prevents, to a large extent, defects such as gas bubb...

Placing The Thermo-couples
The following illustrations from the Taylor Instrument Compan...

Tool Or Crucible Steel
Crucible steel can be annealed either in muffled furnace or b...



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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