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Steel Making

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

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

Quenching The Work
In some operations case-hardened work is quenched from the bo...

Carburizing Material
The simplest carburizing substance is charcoal. It is also th...

Carbon Steels For Different Tools
All users of tool steels should carefully study the different...

Piston Pin
The piston pin on an aviation engine must possess maximum res...

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

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

Tempering Colors On Carbon Steels
Opinions differ as to the temperature which is indicated by t...

The Modern Hardening Room
A hardening room of today means a very different place from ...

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

Classifications Of Steel
Among makers and sellers, carbon tool-steels are classed by g...

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

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

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

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

S A E Heat Treatments
The Society of Automotive Engineers have adopted certain heat...

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

Heat-treating Equipment And Methods For Mass Production
The heat-treating department of the Brown-Lipe-Chapin Company...

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



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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