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Steel Making

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

Impact Tests
Impact tests are of considerable importance as an indication ...

The Effect
The heating at 1,600 deg.F. gives the first heat treatment w...

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

The Care Of Carburizing Compounds
Of all the opportunities for practicing economy in the heat-t...

Properties Of Steel
Steels are known by certain tests. Early tests were more or l...

Effect Of A Small Amount Of Copper In Medium-carbon Steel
This shows the result of tests by C. R. Hayward and A. B. Joh...

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

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

Hardening
The forgings can be hardened by cooling in still air or quen...

Annealing Of Rifle Components At Springfield Armory
In general, all forgings of the components of the arms manufa...

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

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

The Leeds And Northrup Potentiometer System
The potentiometer pyrometer system is both flexible and subst...

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

For Milling Cutters And Formed Tools
FORGING.--Forge as before.--ANNEALING.--Place the steel in a ...

Quality And Structure
The quality of high-speed steel is dependent to a very great ...

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

Composition Of Transmission-gear Steel
If the nickel content of this steel is eliminated, and the pe...

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



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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