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   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

Hardening Operation
Hardening a gear is accomplished as follows: The gear is tak...

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 ...

Placing The Thermo-couples
The following illustrations from the Taylor Instrument Compan...

Properties Of Alloy Steels
The following table shows the percentages of carbon, manganes...

Annealing
ANNEALING can be done by heating to temperatures ranging from...

Mushet And Bessemer
That Mushet was "used" by Ebbw Vale against Bessemer is, perh...

A Chromium-cobalt Steel
The Latrobe Steel Company make a high-speed steel without tun...

Composition Of Transmission-gear Steel
If the nickel content of this steel is eliminated, and the pe...

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

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

Nickel
Nickel may be considered as the toughest among the non-rare a...

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

Application To The Automotive Industry
The information given on the various parts of the Liberty eng...

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...

Heat Treatment Of Steel
Heat treatment consists in heating and cooling metal at defin...

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

Steel Before The 1850's
In spite of a rapid increase in the use of machines and the ...

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

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



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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