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Steel Making

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

Short Method Of Treatment
In the new method, the packed pots are run into the case-har...

Fatigue Tests
It has been known for fifty years that a beam or rod would fa...

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

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

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

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

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

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

Affinity Of Nickel Steel For Carbon
The carbon- and nickel-steel gears are carburized separately...

Effect Of A Small Amount Of Copper In Medium-carbon Steel
This shows the result of tests by C. R. Hayward and A. B. Joh...

Steel For Chisels And Punches
The highest grades of carbon or tempering steels are to be re...

Machineability
Reheating for machine ability was done at 100 deg. less than ...

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

Connecting Rods
The material used for all connecting rods on the Liberty engi...

Annealing Method
Forgings which are too hard to machine are put in pots with ...

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

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

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

Carbon In Tool Steel
Carbon tool steel, or tool steel as it is commonly called, us...



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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