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

The Modern Hardening Room
A hardening room of today means a very different place from ...

The Theory Of Tempering
Steel that has been hardened is generally harder and more br...

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

Testing And Inspection Of Heat Treatment
The hard parts of the gear must be so hard that a new mill f...

Cutting-off Steel From Bar
To cut a piece from an annealed bar, cut off with a hack saw,...

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

Plant For Forging Rifle Barrels
The forging of rifle barrels in large quantities and heat-tre...

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

Alloying Elements
Commercial steels of even the simplest types are therefore p...

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

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

Uses Of The Various Tempers Of Carbon Tool Steel
DIE TEMPER.--No. 3: All kinds of dies for deep stamping, pres...

Steel Before The 1850's
In spite of a rapid increase in the use of machines and the ...

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

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

Short Method Of Treatment
In the new method, the packed pots are run into the case-har...

Molybdenum
Molybdenum steels have been made commercially for twenty-five...

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

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



Annealing In Bone






Category: ANNEALING

Steel and cast iron may both be annealed in granulated bone. Pack the
work the same as for case-hardening except that it is not necessary
to keep the pieces away from each other. Pack with bone that has
been used until it is nearly white. Heat as hot as necessary for
the steel and let the furnace cool down. If the boxes are removed
from furnace while still warm, cover boxes and all in warm ashes
or sand, air slaked lime or old, burned bone to retain heat as
long as possible. Do not remove work from boxes until cold.





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