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Steel Making

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

Vanadium
Vanadium has a very marked effect upon alloy steels rich in c...

Introduction Of Carbon
The matter to which these notes are primarily directed is the...

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

Sulphur
SULPHUR is another element (symbol S) which is always found i...

Heat Treatment Of Axles
Parts of this general type should be heat-treated to show the...

Temperatures To Use
As soon as the temperature of the steel reaches 100 deg.C. (...

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

The Electric Process
The fourth method of manufacturing steel is by the electric f...

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

Compensating Leads
By the use of compensating leads, formed of the same materia...

Carburizing By Gas
The process of carburizing by gas, briefly mentioned on page ...

Phosphorus
PHOSPHORUS is an element (symbol P) which enters the metal fr...

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

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

Heating
Although it is possible to work steels cold, to an extent de...

Shrinking And Enlarging Work
Steel can be shrunk or enlarged by proper heating and cooling...

Tempering Round Dies
A number of circular dies of carbon tool steel for use in too...

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

Corrosion
This steel like any other steel when distorted by cold worki...



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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Previous: High-carbon Machinery Steel



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