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Steel Making

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

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

Carburizing Material
The simplest carburizing substance is charcoal. It is also th...

Complete Calibration Of Pyrometers
For the complete calibration of a thermo-couple of unknown e...

William Kelly's Air-boiling Process
An account of Bessemer's address to the British Association w...

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

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

Critical Points
One of the most important means of investigating the properti...

Carbon Tool Steel
Heat to a bright red, about 1,500 to 1,550 deg.F. Do not ham...

Annealing Method
Forgings which are too hard to machine are put in pots with ...

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

Manganese adds considerably to the tensile strength of steel,...

Cyanide Bath For Tool Steels
All high-carbon tool steels are heated in a cyanide bath. Wi...

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

Tempering Round Dies
A number of circular dies of carbon tool steel for use in too...

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

Protectors For Thermo-couples
Thermo-couples must be protected from the danger of mechanica...

The Forging Of Steel
So much depends upon the forging of steel that this operation...

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

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

Heat Treatment Of Lathe Planer And Similar Tools


FIRE.--For these tools a good fire is one made of hard foundry
coke, broken in small pieces, in an ordinary blacksmith forge with
a few bricks laid over the top to form a hollow fire. The bricks
should be thoroughly heated before tools are heated. Hard coal
may be used very successfully in place of hard coke and will give
a higher heat. It is very easy to give Blue Chip the proper heat
if care is used in making up the fire.

FORGING.--Heat slowly and uniformly to a good forging heat. Do
not hammer the steel after it cools below a bright red. Avoid as
much as possible heating the body of the tool, so as to retain
the natural toughness in the neck of the tool.

HARDENING.--Heat the point of the tool to an extreme white heat
(about 2,200 deg.F.) until the flux runs. This heat should be the highest
possible short of melting the point. Care should be taken to confine
the heat as near to the point as possible so as to leave the annealing
and consequent toughness in the neck of the tool and where the tool
is held in the tool post.

COOL in an air blast, the open air or in oil, depending upon the
tools or the work they are to do.

For roughing tools temper need not be drawn except for work where
the edge tends to crumble on account of being too hard.

For finishing tools draw the temper to suit the purpose for which
they are to be used.

GRIND thoroughly on dry wheel (or wet wheel if care is used to prevent

Next: Heat Treatment Of Milling Cutters Drills Reamers Etc

Previous: Lathe And Planer Tools

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