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Heat Treatment Of Gear Blanks
This section is based on a paper read before the American Gea...

Annealing
ANNEALING can be done by heating to temperatures ranging from...

Detrimental Elements
Sulphur and phosphorus are two elements known to be detrimen...

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

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

Cyanide Bath For Tool Steels
All high-carbon tool steels are heated in a cyanide bath. Wi...

Rate Of Cooling
At the option of the manufacturer, the above treatment of gea...

Hardening
The forgings can be hardened by cooling in still air or quen...

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

Correction For Cold-junction Errors
The voltage generated by a thermo-couple of an electric pyrom...

Hints For Tool Steel Users
Do not hesitate to ask for information from the maker as to t...

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

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

Annealing Of High-speed Steel
For annealing high-speed steel, some makers recommend using g...

Piston Pin
The piston pin on an aviation engine must possess maximum res...

Non-shrinking Oil-hardening Steels
Certain steels have a very low rate of expansion and contract...

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

Calibration Of Pyrometer With Common Salt
An easy and convenient method for standardization and one whi...

Preparing Parts For Local Case-hardening
At the works of the Dayton Engineering Laboratories Company, ...

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



Annealing






Category: ALLOYS AND THEIR EFFECT UPON STEEL

ANNEALING can be done by heating to temperatures ranging from 1,290
to 1,380 deg.F. and cooling in air or quenching in water or oil. After
this treatment the forgings will have a hardness of about 200 Brinell
and a tensile strength of 100,000 to 112,000 lb. per square inch.
If softer forgings are desired they can be heated to a temperature
of from 1,560 to 1,650 deg.F. and cooled very slowly. Although softer
the forgings will not machine as smoothly as when annealed at the
lower temperature.





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Previous: High-chromium Or Rust-proof Steel



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