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Steel Making

Calibration Of Pyrometer With Common Salt
An easy and convenient method for standardization and one whi...

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

Tungsten
Tungsten, as an alloy in steel, has been known and used for a...

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

Steel For Chisels And Punches
The highest grades of carbon or tempering steels are to be re...

Open Hearth Process
The open hearth furnace consists of a big brick room with a l...

Annealing Alloy Steel
The term alloy steel, from the steel maker's point of view, r...

Cutting-off Steel From Bar
To cut a piece from an annealed bar, cut off with a hack saw,...

Heat Treatment Of Milling Cutters Drills Reamers Etc
THE FIRE.--Gas and electric furnaces designed for high heats ...

Application Of Liberty Engine Materials To The Automotive Industry
The success of the Liberty engine program was an engineer...

Steel Before The 1850's
In spite of a rapid increase in the use of machines and the ...

Flange Shields For Furnaces
Such portable flame shields as the one illustrated in Fig. 1...

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

Annealing
There is no mystery or secret about the proper annealing of d...

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

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

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

Piston Pin
The piston pin on an aviation engine must possess maximum res...

Instructions For Working High-speed Steel
Owing to the wide variations in the composition of high-speed...

Placing The Thermo-couples
The following illustrations from the Taylor Instrument Compan...



Heat Treatment Of Lathe Planer And Similar Tools






Category: HIGH-SPEED STEEL

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
checking).





Next: Heat Treatment Of Milling Cutters Drills Reamers Etc

Previous: Lathe And Planer Tools



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