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

Steel Making

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

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

Protectors For Thermo-couples
Thermo-couples must be protected from the danger of mechanica...

Carburizing Material
The simplest carburizing substance is charcoal. It is also th...

Using Illuminating Gas
The choice of a carburizing furnace depends greatly on the fa...

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...

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

Liberty Motor Connecting Rods
The requirements for materials for the Liberty motor connecti...

Placing Of Pyrometers
When installing a pyrometer, care should be taken that it re...

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

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

Protective Screens For Furnaces
Workmen needlessly exposed to the flames, heat and glare from...

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

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

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...

Take Time For Hardening
Uneven heating and poor quenching has caused loss of many ve...

The Thermo-couple
With the application of the thermo-couple, the measurement of...

Bessemer Process
The bessemer process consists of charging molten pig iron int...



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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