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Steel Making

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

Double Annealing
Water annealing consists in heating the piece, allowing it to...

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

Annealing In Bone
Steel and cast iron may both be annealed in granulated bone. ...

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

Preventing Cracks In Hardening
The blacksmith in the small shop, where equipment is usually ...

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

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

Tempering Colors On Carbon Steels
Opinions differ as to the temperature which is indicated by t...

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

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

Annealing Work
With the exception of several of the higher types of alloy s...

Affinity Of Nickel Steel For Carbon
The carbon- and nickel-steel gears are carburized separately...

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

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

Chrome-nickel Steel
Forging heat of chrome-nickel steel depends very largely on ...

Crucible Steel
Crucible steel is still made by melting material in a clay or...

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

Suggestions For Handling High-speed Steels
The following suggestions for handling high-speed steels are ...

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



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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