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   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

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

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

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

Plant For Forging Rifle Barrels
The forging of rifle barrels in large quantities and heat-tre...

Conclusions
Martien was probably never a serious contender for the honor ...

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

Annealing To Relieve Internal Stresses
Work quenched from a high temperature and not afterward tempe...

Hardness Testing
The word hardness is used to express various properties of me...

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

High-carbon Machinery Steel
The carbon content of this steel is above 30 points and is ha...

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

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

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

The Electric Process
The fourth method of manufacturing steel is by the electric f...

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

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

Manganese
MANGANESE is a metal much like iron. Its chemical symbol is M...

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

Annealing Of High-speed Steel
For annealing high-speed steel, some makers recommend using g...

Pyrometers
Armor plate makers sometimes use the copper ball or Siemens' ...



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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