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Steel Making

Flange Shields For Furnaces
Such portable flame shields as the one illustrated in Fig. 1...

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

Gears
The material used for all gears on the Liberty engine was sel...

Liberty Motor Connecting Rods
The requirements for materials for the Liberty motor connecti...

Tungsten
Tungsten, as an alloy in steel, has been known and used for a...

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

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

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

Heat Treatment Of Punches And Dies Shears Taps Etc
HEATING.--The degree to which tools of the above classes shou...

Take Time For Hardening
Uneven heating and poor quenching has caused loss of many ve...

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

The Effect
The heating at 1,600 deg.F. gives the first heat treatment w...

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

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

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

Rate Of Absorption
According to Guillet, the absorption of carbon is favored by ...

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

Silicon
SILICON is a very widespread element (symbol Si), being an es...

Carbon Tool Steel
Heat to a bright red, about 1,500 to 1,550 deg.F. Do not ham...

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



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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