The Line of Head, or indication of the Mentality of the subject, must in all cases be considered as the most important line on the hand. The greatest attention should be paid to it, so as to obtain a clear grasp of the Mentality under consid... Read more of The Line Of Head And Its Variations at Palm Readings.orgInformational Site Network Informational
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   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

Pickling The Forgings
The forgings were then pickled in a hot solution of either ni...

Quality And Structure
The quality of high-speed steel is dependent to a very great ...

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

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

Hardening High-speed Steels
We will now take up the matter of hardening high-speed steels...

Complete Calibration Of Pyrometers
For the complete calibration of a thermo-couple of unknown e...

Heat Treatment Of Steel
Heat treatment consists in heating and cooling metal at defin...

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

Application Of Liberty Engine Materials To The Automotive Industry
The success of the Liberty engine program was an engineer...

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

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

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

Steel Worked In Austenitic State
As a general rule steel should be worked when it is in the a...

Silicon
Silicon prevents, to a large extent, defects such as gas bubb...

Quenching Tool Steel
To secure proper hardness, the cooling of quenching of steel ...

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

Heat Treatment Of Milling Cutters Drills Reamers Etc
THE FIRE.--Gas and electric furnaces designed for high heats ...

Nickel-chromium
A combination of the characteristics of nickel and the charac...

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

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



Annealing Method






Category: HEAT TREATMENT OF STEEL

Forgings which are too hard to machine are put
in pots with a little charcoal to cause a reducing atmosphere and
to prevent scale. The covers are then luted on and the pots placed
in the furnace. Carbon steel from 15 to 25 points is annealed at
1,600 deg.F. Nickel steel of the same carbon and containing in addition
3-1/2 per cent nickel is annealed at 1,450 deg.F. When the pots are
heated through, they are rolled to the yard and allowed to cool.
This method of annealing gives the best hardness for quick machining.

The requirements in the machine operations are very rigid and, in
spite of great care and probably the finest equipment of special
machines in the world, a small percentage of the product fails
to pass inspection during or at the completion of the machine
operations. These pieces, however, are not a loss, for they play
an important part in the hardening process, indicating as they do
the exact depth of penetration of the carburizing material and
the condition of both case and core.





Next: Heat-treating Department

Previous: Heat-treating Equipment And Methods For Mass Production



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