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

Steel Making

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

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

Air-hardening Steels
These steels are recommended for boring, turning and planing...

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

Hardening High-speed Steels
We will now take up the matter of hardening high-speed steels...

Mushet And Bessemer
That Mushet was "used" by Ebbw Vale against Bessemer is, perh...

Affinity Of Nickel Steel For Carbon
The carbon- and nickel-steel gears are carburized separately...

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

Correction For Cold-junction Errors
The voltage generated by a thermo-couple of an electric pyrom...

Heat Treatment Of Steel
Heat treatment consists in heating and cooling metal at defin...

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

Steel Worked In Austenitic State
As a general rule steel should be worked when it is in the a...

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

The Thermo-couple
With the application of the thermo-couple, the measurement of...

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

Annealing Method
Forgings which are too hard to machine are put in pots with ...

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

Introduction Of Carbon
The matter to which these notes are primarily directed is the...

Machineability
Reheating for machine ability was done at 100 deg. less than ...

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



Air-hardening Steels






Category: FURNACES

These steels are recommended for boring,
turning and planing where the cost of high-speed seems excessive.
They are also recommended for hard wood knives, for roughing and
finishing bronze and brass, and for hot bolt forging dies. This
steel cannot be cut or punched cold but can be shaped and ground
on abrasive wheels of various kinds.

It should be heated slowly and evenly for forging and kept as evenly
heated at a bright red as possible. It should not be forged after
it cools to a dark red.

After the tool is made, heat it again to a bright red and lay it
down to cool in a dry place or it can be cooled in a cold, dry
air blast. Water must be kept away from it while it is hot.





Next: Typical Oil-fired Furnaces

Previous: Hardening High-speed Steel



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