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Steel Making

Highly Stressed Parts
The highly stressed parts on the Liberty engine consisted of ...

The Modern Hardening Room
A hardening room of today means a very different place from ...

The Influence Of Size
The size of the piece influences the physical properties obta...

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

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

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

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

Optical System And Electrical Circuit Of The Leeds & Northrup Optical Pyrometer
For extremely high temperature, the optical pyrometer is lar...

Using Illuminating Gas
The choice of a carburizing furnace depends greatly on the fa...

The Theory Of Tempering
Steel that has been hardened is generally harder and more br...

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

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

The Quenching Tank
The quenching tank is an important feature of apparatus in c...

Brown Automatic Signaling Pyrometer
In large heat-treating plants it has been customary to mainta...

Composition And Properties Of Steel
It is a remarkable fact that one can look through a dozen tex...

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

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

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

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

Effects Of Proper Annealing
Proper annealing of low-carbon steels causes a complete solu...



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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