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Steel Making

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

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

Annealing To Relieve Internal Stresses
Work quenched from a high temperature and not afterward tempe...

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

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

Effect Of Different Carburizing Material
[Illustrations: FIGS. 33 to 37.] Each of these different p...

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

Annealing
There is no mystery or secret about the proper annealing of d...

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

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

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

Refining The Grain
This is remedied by reheating the piece to a temperature slig...

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

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

Heating
Although it is possible to work steels cold, to an extent de...

Tempering Colors On Carbon Steels
Opinions differ as to the temperature which is indicated by t...

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

The Leeds And Northrup Potentiometer System
The potentiometer pyrometer system is both flexible and subst...

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

Crankshaft
The crankshaft was the most highly stressed part of the entir...



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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