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

Steel Making

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

Annealing Method
Forgings which are too hard to machine are put in pots with ...

Placing The Thermo-couples
The following illustrations from the Taylor Instrument Compan...

Quenching
It is considered good practice to quench alloy steels from th...

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

The Electric Process
The fourth method of manufacturing steel is by the electric f...

Application Of Liberty Engine Materials To The Automotive Industry
The success of the Liberty engine program was an engineer...

Carbon-steel Forgings
Low-stressed, carbon-steel forgings include such parts as car...

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

Pyrometers For Molten Metal
Pyrometers for molten metal are connected to portable thermoc...

Carbon Tool Steel
Heat to a bright red, about 1,500 to 1,550 deg.F. Do not ham...

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

Standard Analysis
The selection of a standard analysis by the manufacturer is t...

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

Correction By Zero Adjustment
Many pyrometers are supplied with a zero adjuster, by means ...

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

Highly Stressed Parts
The highly stressed parts on the Liberty engine consisted of ...

Leeds And Northrup Optical Pyrometer
The principles of this very popular method of measuring tempe...

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

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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