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Steel Making

The Penetration Of Carbon
Carburized mild steel is used to a great extent in the manufa...

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

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

William Kelly's Air-boiling Process
An account of Bessemer's address to the British Association w...

Cutting-off Steel From Bar
To cut a piece from an annealed bar, cut off with a hack saw,...

Furnace Data
In order to give definite information concerning furnaces, fu...

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

Leeds And Northrup Optical Pyrometer
The principles of this very popular method of measuring tempe...

Crankshaft
The crankshaft was the most highly stressed part of the entir...

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

A Satisfactory Luting Mixture
A mixture of fireclay and sand will be found very satisfactor...

High Speed Steel
For centuries the secret art of making tool steel was handed ...

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

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

Corrosion
This steel like any other steel when distorted by cold worki...

Cyanide Bath For Tool Steels
All high-carbon tool steels are heated in a cyanide bath. Wi...

Sulphur
SULPHUR is another element (symbol S) which is always found i...

Application Of Liberty Engine Materials To The Automotive Industry
The success of the Liberty engine program was an engineer...

Temperature For Annealing
Theoretically, annealing should be accomplished at a tempera...

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



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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