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Steel Making

Testing And Inspection Of Heat Treatment
The hard parts of the gear must be so hard that a new mill f...

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

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

Rate Of Cooling
At the option of the manufacturer, the above treatment of gea...

Placing The Thermo-couples
The following illustrations from the Taylor Instrument Compan...

Leeds And Northrup Optical Pyrometer
The principles of this very popular method of measuring tempe...

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

Properties Of Steel
Steels are known by certain tests. Early tests were more or l...

Blending The Compound
Essentially, this consists of the sturdy, power-driven separa...

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

Piston Pin
The piston pin on an aviation engine must possess maximum res...

Annealing Alloy Steel
The term alloy steel, from the steel maker's point of view, r...

Instructions For Working High-speed Steel
Owing to the wide variations in the composition of high-speed...

Quenching
It is considered good practice to quench alloy steels from th...

The Pyrometer And Its Use
In the heat treatment of steel, it has become absolutely nece...

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

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

High Speed Steel
For centuries the secret art of making tool steel was handed ...

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

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



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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