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Steel Making

Tensile Properties
Strength of a metal is usually expressed in the number of pou...

Properties Of Alloy Steels
The following table shows the percentages of carbon, manganes...

Restoring Overheated Steel
The effect of heat treatment on overheated steel is shown gra...

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

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

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

Take Time For Hardening
Uneven heating and poor quenching has caused loss of many ve...

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

Phosphorus
PHOSPHORUS is an element (symbol P) which enters the metal fr...

Forging High-speed Steel
Heat very slowly and carefully to from 1,800 to 2,000 deg.F....

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

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

Sulphur
Sulphur is another impurity and high sulphur is even a greate...

Heavy Forging Practice
In heavy forging practice where the metal is being worked at...

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

Heat Treatment Of Lathe Planer And Similar Tools
FIRE.--For these tools a good fire is one made of hard foundr...

S A E Heat Treatments
The Society of Automotive Engineers have adopted certain heat...

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

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

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



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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