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

Uses Of The Various Tempers Of Carbon Tool Steel
DIE TEMPER.--No. 3: All kinds of dies for deep stamping, pres...

Complete Calibration Of Pyrometers
For the complete calibration of a thermo-couple of unknown e...

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

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

Lathe And Planer Tools
FORGING.--Gently warm the steel to remove any chill, is parti...

High-chromium Or Rust-proof Steel
High-chromium, or what is called stainless steel containing f...

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

Optical System And Electrical Circuit Of The Leeds & Northrup Optical Pyrometer
For extremely high temperature, the optical pyrometer is lar...

Vanadium
Vanadium has a very marked effect upon alloy steels rich in c...

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

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

Take Time For Hardening
Uneven heating and poor quenching has caused loss of many ve...

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

The Packing Department
In Fig. 56 is shown the packing pots where the work is packe...

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

Pyrometry And Pyrometers
A knowledge of the fundamental principles of pyrometry, or th...

Refining The Grain
This is remedied by reheating the piece to a temperature slig...

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

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



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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