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

Steel Making

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

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

Chrome-nickel Steel
Forging heat of chrome-nickel steel depends very largely on ...

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

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

Rate Of Absorption
According to Guillet, the absorption of carbon is favored by ...

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

Blending The Compound
Essentially, this consists of the sturdy, power-driven separa...

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

Instructions For Working High-speed Steel
Owing to the wide variations in the composition of high-speed...

Hardness Testing
The word hardness is used to express various properties of me...

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

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

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

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...

Gears
The material used for all gears on the Liberty engine was sel...

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

Properties Of Steel
Steels are known by certain tests. Early tests were more or l...

Ebbw Vale And The Bessemer Process
After his British Association address in August 1856, Besseme...

Heat Treatment Of Axles
Parts of this general type should be heat-treated to show the...



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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