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

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

Steel Can Be Worked Cold
As noted above, steel can be worked cold, as in the case of ...

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

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

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

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

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

Blending The Compound
Essentially, this consists of the sturdy, power-driven separa...

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

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

The Quenching Tank
The quenching tank is an important feature of apparatus in c...

Machineability
Reheating for machine ability was done at 100 deg. less than ...

Drop Forging Dies
The kind of steel used in the die of course influences the he...

Separating The Work From The Compound
During the pulling of the heat, the pots are dumped upon a ca...

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

Vanadium
Vanadium has a very marked effect upon alloy steels rich in c...

Liberty Motor Connecting Rods
The requirements for materials for the Liberty motor connecti...

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

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



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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