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

Affinity Of Nickel Steel For Carbon
The carbon- and nickel-steel gears are carburized separately...

Shrinking And Enlarging Work
Steel can be shrunk or enlarged by proper heating and cooling...

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

Pyrometers
Armor plate makers sometimes use the copper ball or Siemens' ...

Temperature For Annealing
Theoretically, annealing should be accomplished at a tempera...

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

Hardening High-speed Steel
In forging use coke for fuel in the forge. Heat steel slowly ...

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

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

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

The Effect Of Tempering On Water-quenched Gages
The following information has been supplied by Automatic and ...

Phosphorus
Phosphorus is one of the impurities in steel, and it has been...

Steel For Chisels And Punches
The highest grades of carbon or tempering steels are to be re...

Tool Or Crucible Steel
Crucible steel can be annealed either in muffled furnace or b...

Carbon Steels For Different Tools
All users of tool steels should carefully study the different...

Tempering Colors On Carbon Steels
Opinions differ as to the temperature which is indicated by t...

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...

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

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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