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Preparing Parts For Local Case-hardening
At the works of the Dayton Engineering Laboratories Company, ...

Protective Screens For Furnaces
Workmen needlessly exposed to the flames, heat and glare from...

Connecting Rods
The material used for all connecting rods on the Liberty engi...

The Effect Of Tempering On Water-quenched Gages
The following information has been supplied by Automatic and ...

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

Bessemer Process
The bessemer process consists of charging molten pig iron int...

Effect Of Different Carburizing Material
[Illustrations: FIGS. 33 to 37.] Each of these different p...

Hardening Operation
Hardening a gear is accomplished as follows: The gear is tak...

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

Quality And Structure
The quality of high-speed steel is dependent to a very great ...

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

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

A Chromium-cobalt Steel
The Latrobe Steel Company make a high-speed steel without tun...

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

Heating Of Manganese Steel
Another form of heat-treating furnace is that which is used ...

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

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

Heating
Although it is possible to work steels cold, to an extent de...

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

The Leeds And Northrup Potentiometer System
The potentiometer pyrometer system is both flexible and subst...



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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