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Steel Making

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

Detrimental Elements
Sulphur and phosphorus are two elements known to be detrimen...

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

Temperatures To Use
As soon as the temperature of the steel reaches 100 deg.C. (...

Heat Treatment Of Milling Cutters Drills Reamers Etc
THE FIRE.--Gas and electric furnaces designed for high heats ...

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

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

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

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

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

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

Compensating Leads
By the use of compensating leads, formed of the same materia...

Carbon-steel Forgings
Low-stressed, carbon-steel forgings include such parts as car...

Knowing What Takes Place
How are we to know if we have given a piece of steel the ver...

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

Separating The Work From The Compound
During the pulling of the heat, the pots are dumped upon a ca...

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

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

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

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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