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Heat Treatment Of Punches And Dies Shears Taps Etc
HEATING.--The degree to which tools of the above classes shou...

Annealing Of Rifle Components At Springfield Armory
In general, all forgings of the components of the arms manufa...

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

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

The Modern Hardening Room
A hardening room of today means a very different place from ...

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

Nickel
Nickel may be considered as the toughest among the non-rare a...

Furnace Data
In order to give definite information concerning furnaces, fu...

Heavy Forging Practice
In heavy forging practice where the metal is being worked at...

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

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

For Milling Cutters And Formed Tools
FORGING.--Forge as before.--ANNEALING.--Place the steel in a ...

Heat Treatment Of Axles
Parts of this general type should be heat-treated to show the...

Detrimental Elements
Sulphur and phosphorus are two elements known to be detrimen...

Impact Tests
Impact tests are of considerable importance as an indication ...

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

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

Sulphur
SULPHUR is another element (symbol S) which is always found i...

Short Method Of Treatment
In the new method, the packed pots are run into the case-har...

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



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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