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   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

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

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

Process Of Carburizing
Carburizing imparts a shell of high-carbon content to a low-...

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

Take Time For Hardening
Uneven heating and poor quenching has caused loss of many ve...

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

Fatigue Tests
It has been known for fifty years that a beam or rod would fa...

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

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

William Kelly's Air-boiling Process
An account of Bessemer's address to the British Association w...

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

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

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

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

Temperature For Annealing
Theoretically, annealing should be accomplished at a tempera...

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

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

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

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

Carbon In Tool Steel
Carbon tool steel, or tool steel as it is commonly called, us...



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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