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   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

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

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

Effect Of Different Carburizing Material
[Illustrations: FIGS. 33 to 37.] Each of these different p...

Testing And Inspection Of Heat Treatment
The hard parts of the gear must be so hard that a new mill f...

The Thermo-couple
With the application of the thermo-couple, the measurement of...

Correction For Cold-junction Errors
The voltage generated by a thermo-couple of an electric pyrom...

Heat-treating Department
The heat-treating department occupies an L-shaped building. ...

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

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

Shrinking And Enlarging Work
Steel can be shrunk or enlarged by proper heating and cooling...

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

Placing Of Pyrometers
When installing a pyrometer, care should be taken that it re...

Nickel-chromium
A combination of the characteristics of nickel and the charac...

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

Tensile Properties
Strength of a metal is usually expressed in the number of pou...

Silicon
SILICON is a very widespread element (symbol Si), being an es...

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

Lathe And Planer Tools
FORGING.--Gently warm the steel to remove any chill, is parti...

Temperature Recording And Regulation
Each furnace is equipped with pyrometers, but the reading an...

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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