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

Heat-treating Equipment And Methods For Mass Production
The heat-treating department of the Brown-Lipe-Chapin Company...

Annealing To Relieve Internal Stresses
Work quenched from a high temperature and not afterward tempe...

Gears
The material used for all gears on the Liberty engine was sel...

Pyrometry And Pyrometers
A knowledge of the fundamental principles of pyrometry, or th...

Hardening Carbon Steel For Tools
For years the toolmaker had full sway in regard to make of st...

Hardening High-speed Steel
In forging use coke for fuel in the forge. Heat steel slowly ...

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

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

Correction By Zero Adjustment
Many pyrometers are supplied with a zero adjuster, by means ...

Hardening
Steel is hardened by quenching from above the upper critical....

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

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

Crankshaft
The crankshaft was the most highly stressed part of the entir...

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

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

The Influence Of Size
The size of the piece influences the physical properties obta...

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

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

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



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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