The success I had during the twenty-five years in which I was connected with this study was, I believe, chiefly owing to the fact that although my principal study was the lines and formation of hands, yet I did not confine myself alone to th... Read more of A Brief Resume Of The History Of The Study Of Hands Through The Centuries To The Present Day at Palm Readings.orgInformational Site Network Informational
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Steel Making

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

Shrinking And Enlarging Work
Steel can be shrunk or enlarged by proper heating and cooling...

Heat Treatment Of Axles
Parts of this general type should be heat-treated to show the...

A Chromium-cobalt Steel
The Latrobe Steel Company make a high-speed steel without tun...

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

Correction By Zero Adjustment
Many pyrometers are supplied with a zero adjuster, by means ...

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...

Temperature Recording And Regulation
Each furnace is equipped with pyrometers, but the reading an...

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

Hardening Carbon Steel For Tools
For years the toolmaker had full sway in regard to make of st...

Steel For Chisels And Punches
The highest grades of carbon or tempering steels are to be re...

Hints For Tool Steel Users
Do not hesitate to ask for information from the maker as to t...

Tool Or Crucible Steel
Crucible steel can be annealed either in muffled furnace or b...

Double Annealing
Water annealing consists in heating the piece, allowing it to...

Making Steel Balls
Steel balls are made from rods or coils according to size, st...

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

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

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

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

Application Of Liberty Engine Materials To The Automotive Industry
The success of the Liberty engine program was an engineer...



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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