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Steel Making

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

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

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

Composition And Properties Of Steel
It is a remarkable fact that one can look through a dozen tex...

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

Rate Of Cooling
At the option of the manufacturer, the above treatment of gea...

Judging The Heat Of Steel
While the use of a pyrometer is of course the only way to hav...

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

Classifications Of Steel
Among makers and sellers, carbon tool-steels are classed by g...

Using Illuminating Gas
The choice of a carburizing furnace depends greatly on the fa...

Carburizing Material
The simplest carburizing substance is charcoal. It is also th...

Corrosion
This steel like any other steel when distorted by cold worki...

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

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

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...

William Kelly's Air-boiling Process
An account of Bessemer's address to the British Association w...

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

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

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



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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