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

Steel Making

Composition Of Transmission-gear Steel
If the nickel content of this steel is eliminated, and the pe...

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

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

Impact Tests
Impact tests are of considerable importance as an indication ...

Carburizing Low-carbon Sleeves
Low-carbon sleeves are carburized and pushed on malleable-ir...

Air-hardening Steels
These steels are recommended for boring, turning and planing...

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

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

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

Heat Treatment Of Lathe Planer And Similar Tools
FIRE.--For these tools a good fire is one made of hard foundr...

High Speed Steel
For centuries the secret art of making tool steel was handed ...

High-chromium Or Rust-proof Steel
High-chromium, or what is called stainless steel containing f...

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

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

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

Double Annealing
Water annealing consists in heating the piece, allowing it to...

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

Preventing Cracks In Hardening
The blacksmith in the small shop, where equipment is usually ...

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

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



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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