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Steel Making

Knowing What Takes Place
How are we to know if we have given a piece of steel the ver...

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

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

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

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

Ebbw Vale And The Bessemer Process
After his British Association address in August 1856, Besseme...

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

Pyrometers For Molten Metal
Pyrometers for molten metal are connected to portable thermoc...

Carburizing Low-carbon Sleeves
Low-carbon sleeves are carburized and pushed on malleable-ir...

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

Carburizing By Gas
The process of carburizing by gas, briefly mentioned on page ...

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

Gears
The material used for all gears on the Liberty engine was sel...

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

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

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

Preventing Cracks In Hardening
The blacksmith in the small shop, where equipment is usually ...

Phosphorus
PHOSPHORUS is an element (symbol P) which enters the metal fr...

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

Rate Of Absorption
According to Guillet, the absorption of carbon is favored by ...



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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