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Heat Treatment Of Punches And Dies Shears Taps Etc
HEATING.--The degree to which tools of the above classes shou...

Robert Mushet
Robert (Forester) Mushet (1811-1891), born in the Forest of D...

Application To The Automotive Industry
The information given on the various parts of the Liberty eng...

Phosphorus
Phosphorus is one of the impurities in steel, and it has been...

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

Pickling The Forgings
The forgings were then pickled in a hot solution of either ni...

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

Chromium
Chromium when alloyed with steel, has the characteristic func...

Steel Before The 1850's
In spite of a rapid increase in the use of machines and the ...

Flange Shields For Furnaces
Such portable flame shields as the one illustrated in Fig. 1...

Short Method Of Treatment
In the new method, the packed pots are run into the case-har...

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

Tempering Round Dies
A number of circular dies of carbon tool steel for use in too...

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

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

Preventing Carburizing By Copper-plating
Copper-plating has been found effective and must have a thick...

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

Critical Points
One of the most important means of investigating the properti...

Fatigue Tests
It has been known for fifty years that a beam or rod would fa...

Detrimental Elements
Sulphur and phosphorus are two elements known to be detrimen...



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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