This is a chronic affection of the nervous system, characterized by muscular weakness, trembling and rigidity. Causes. It usually occurs after the fortieth year, and is more common in men than in women. The exciting causes are exposure to cold a... Read more of SHAKING PALSY. (Paralysis Agitans) at Home Medicine.caInformational Site Network Informational
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Steel Making

Suggestions For Handling High-speed Steels
The following suggestions for handling high-speed steels are ...

Robert Mushet
Robert (Forester) Mushet (1811-1891), born in the Forest of D...

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

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

Restoring Overheated Steel
The effect of heat treatment on overheated steel is shown gra...

Placing The Thermo-couples
The following illustrations from the Taylor Instrument Compan...

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

Preventing Decarbonization Of Tool Steel
It is especially important to prevent decarbonization in such...

Heat-treating Department
The heat-treating department occupies an L-shaped building. ...

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

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

Preventing Carburizing By Copper-plating
Copper-plating has been found effective and must have a thick...

Critical Points
One of the most important means of investigating the properti...

Heat-treating Equipment And Methods For Mass Production
The heat-treating department of the Brown-Lipe-Chapin Company...

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

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

Leeds And Northrup Optical Pyrometer
The principles of this very popular method of measuring tempe...

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

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

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



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.





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Previous: Heat-treating Equipment And Methods For Mass Production



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