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Steel Making

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

Annealing Of High-speed Steel
For annealing high-speed steel, some makers recommend using g...

Composition Of Transmission-gear Steel
If the nickel content of this steel is eliminated, and the pe...

MANGANESE is a metal much like iron. Its chemical symbol is M...

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

S A E Heat Treatments
The Society of Automotive Engineers have adopted certain heat...

The Forging Of Steel
So much depends upon the forging of steel that this operation...

Introduction Of Carbon
The matter to which these notes are primarily directed is the...

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

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

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

Annealing In Bone
Steel and cast iron may both be annealed in granulated bone. ...

High Speed Steel
For centuries the secret art of making tool steel was handed ...

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

Manganese adds considerably to the tensile strength of steel,...

A Chromium-cobalt Steel
The Latrobe Steel Company make a high-speed steel without tun...

Brown Automatic Signaling Pyrometer
In large heat-treating plants it has been customary to mainta...

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

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

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

Heat Treatment Of Lathe Planer And Similar Tools


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

Next: Heat Treatment Of Milling Cutters Drills Reamers Etc

Previous: Lathe And Planer Tools

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