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Effect Of Different Carburizing Material
[Illustrations: FIGS. 33 to 37.] Each of these different p...

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

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

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

Hardening High-speed Steel
In forging use coke for fuel in the forge. Heat steel slowly ...

Gas Consumption For Carburizing
Although the advantages offered by the gas-fired furnace for ...

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

Tensile Properties
Strength of a metal is usually expressed in the number of pou...

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

Short Method Of Treatment
In the new method, the packed pots are run into the case-har...

Protective Screens For Furnaces
Workmen needlessly exposed to the flames, heat and glare from...

Steel Can Be Worked Cold
As noted above, steel can be worked cold, as in the case of ...

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

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

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

Hardening
Steel is hardened by quenching from above the upper critical....

Heavy Forging Practice
In heavy forging practice where the metal is being worked at...

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

Nickel-chromium
A combination of the characteristics of nickel and the charac...

An Automatic Temperature Control Pyrometer
Automatic temperature control instruments are similar to the ...



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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