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Steel Making

Composition Of Transmission-gear Steel
If the nickel content of this steel is eliminated, and the pe...

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

Uses Of The Various Tempers Of Carbon Tool Steel
DIE TEMPER.--No. 3: All kinds of dies for deep stamping, pres...

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

Surface Carburizing
Carburizing, commonly called case-hardening, is the art of pr...

Case-hardening Treatments For Various Steels
Plain water, salt water and linseed oil are the three most co...

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

An Automatic Temperature Control Pyrometer
Automatic temperature control instruments are similar to the ...

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

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

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

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

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

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

Making Steel Balls
Steel balls are made from rods or coils according to size, st...

Hints For Tool Steel Users
Do not hesitate to ask for information from the maker as to t...

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

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

Steel Worked In Austenitic State
As a general rule steel should be worked when it is in the a...

The Effect
The heating at 1,600 deg.F. gives the first heat treatment w...



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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