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Steel Making

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

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

Quenching
It is considered good practice to quench alloy steels from th...

Chrome-nickel Steel
Forging heat of chrome-nickel steel depends very largely on ...

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

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

Hints For Tool Steel Users
Do not hesitate to ask for information from the maker as to t...

Impact Tests
Impact tests are of considerable importance as an indication ...

Hardness Testing
The word hardness is used to express various properties of me...

Using Illuminating Gas
The choice of a carburizing furnace depends greatly on the fa...

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

Care In Annealing
Not only will benefits in machining be found by careful anne...

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

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

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

Preparing Parts For Local Case-hardening
At the works of the Dayton Engineering Laboratories Company, ...

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

Pickling The Forgings
The forgings were then pickled in a hot solution of either ni...

The Forging Of Steel
So much depends upon the forging of steel that this operation...

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



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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