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Steel Making

Alloying Elements
Commercial steels of even the simplest types are therefore p...

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

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

Heat Treatment Of Gear Blanks
This section is based on a paper read before the American Gea...

Highly Stressed Parts
The highly stressed parts on the Liberty engine consisted of ...

Instructions For Working High-speed Steel
Owing to the wide variations in the composition of high-speed...

Introduction Of Carbon
The matter to which these notes are primarily directed is the...

Placing Of Pyrometers
When installing a pyrometer, care should be taken that it re...

Protectors For Thermo-couples
Thermo-couples must be protected from the danger of mechanica...

The Influence Of Size
The size of the piece influences the physical properties obta...

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

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

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

Heat Treatment Of Axles
Parts of this general type should be heat-treated to show the...

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

Manganese
MANGANESE is a metal much like iron. Its chemical symbol is M...

The Theory Of Tempering
Steel that has been hardened is generally harder and more br...

Process Of Carburizing
Carburizing imparts a shell of high-carbon content to a low-...

Molybdenum
Molybdenum steels have been made commercially for twenty-five...

Annealing Of Rifle Components At Springfield Armory
In general, all forgings of the components of the arms manufa...



Steel Can Be Worked Cold






Category: THE FORGING OF STEEL

As noted above, steel can be worked cold,
as in the case of cold-rolled steel. Heat treatment of cold-worked
steel is a very delicate operation. Cold working hardens and strengthens
steel. It also introduces internal stresses. Heat-treatments are
designed to eliminate the stresses without losing the hardness
and strength. This is done by tempering at a low heat. Avoid the
blue range (350 to 750 deg.C.). Tempering for a considerable time just
under the critical is liable to cause great brittleness. Annealing
(reheating through the critical) destroys the effect of cold work.





Next: Forging High-speed Steel

Previous: Steel Worked In Austenitic State



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