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

Steel Making

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

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

Effect Of A Small Amount Of Copper In Medium-carbon Steel
This shows the result of tests by C. R. Hayward and A. B. Joh...

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

An Automatic Temperature Control Pyrometer
Automatic temperature control instruments are similar to the ...

Fatigue Tests
It has been known for fifty years that a beam or rod would fa...

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

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

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

Application To The Automotive Industry
The information given on the various parts of the Liberty eng...

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

The Care Of Carburizing Compounds
Of all the opportunities for practicing economy in the heat-t...

Chromium
Chromium when alloyed with steel, has the characteristic func...

Hardening
Steel is hardened by quenching from above the upper critical....

Cutting-off Steel From Bar
To cut a piece from an annealed bar, cut off with a hack saw,...

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

Typical Oil-fired Furnaces
Several types of standard oil-fired furnaces are shown herew...

Compensating Leads
By the use of compensating leads, formed of the same materia...

Heating
Although it is possible to work steels cold, to an extent de...

Heavy Forging Practice
In heavy forging practice where the metal is being worked at...



Heat Treatment Of Milling Cutters Drills Reamers Etc






Category: HIGH-SPEED STEEL

THE FIRE.--Gas and electric furnaces designed for high heats are
now made for treating high-speed steels. We recommend them for
treating all kinds of Blue Chip tools and particularly the above
class. After tools reach a yellow heat in the forge fire they must
not be allowed to touch the fuel or come in contact with the blast
or surrounding air.

HEATING.--Tools of this kind should be heated to a mellow white
heat, or as hot as possible without injuring the cutting edges
(2,000 to 2,200 deg.F.). For most work the higher the heat the better
the tool. Where furnaces are used, we recommend preheating the
tools to a red heat in one furnace before putting them in a white
hot furnace.

COOLING.--We recommend quenching all of the above tools in oil
when taken from the fire. We have found fish oil, cottonseed oil,
Houghton's No. 2 soluble oil and linseed oil satisfactory. The
high heat is the important thing in hardening Blue Chip tools.
If a white hot tool is allowed to cool in the open air it will be
hard, but the air scales the tool.

DRAWING THE TEMPER.--Tools of this class should be drawn considerably
more than water-hardening steel for the same purpose.





Next: Heat Treatment Of Punches And Dies Shears Taps Etc

Previous: Heat Treatment Of Lathe Planer And Similar Tools



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