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An Automatic Temperature Control Pyrometer
Automatic temperature control instruments are similar to the ...

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

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

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

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

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

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

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

Classifications Of Steel
Among makers and sellers, carbon tool-steels are classed by g...

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

Pyrometry And Pyrometers
A knowledge of the fundamental principles of pyrometry, or th...

Chromium
Chromium when alloyed with steel, has the characteristic func...

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

Silicon
SILICON is a very widespread element (symbol Si), being an es...

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

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

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

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

The Pyrometer And Its Use
In the heat treatment of steel, it has become absolutely nece...

Hardening High-speed Steel
In forging use coke for fuel in the forge. Heat steel slowly ...



Effects Of Proper Annealing






Category: HEAT TREATMENT OF STEEL

Proper annealing of low-carbon steels
causes a complete solution or combination to take place between
the ferrite and pearlite, producing a homogeneous mass of small
grains of each, the grains of the pearlite being surrounded by
grains of ferrite. A steel of this refinement will machine to good
advantage, due to the fact that the cutting tool will at all times
be in contact with metal of uniform composition.

While the alternate bands of ferrite and pearlite are microscopically
sized, it has been found that with a Gleason or Fellows gear-cutting
machine that rough cutting can be traced to poorly annealed steels,
having either a pronounced banded structure or a coarse granular
structure.





Next: Temperature For Annealing

Previous: Process Of Carburizing



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