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Steel Making

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

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

Annealing
There is no mystery or secret about the proper annealing of d...

Hardening Carbon Steel For Tools
For years the toolmaker had full sway in regard to make of st...

Making Steel Balls
Steel balls are made from rods or coils according to size, st...

Properties Of Steel
Steels are known by certain tests. Early tests were more or l...

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

Tool Or Crucible Steel
Crucible steel can be annealed either in muffled furnace or b...

Application To The Automotive Industry
The information given on the various parts of the Liberty eng...

Connecting Rods
The material used for all connecting rods on the Liberty engi...

Tempering Colors On Carbon Steels
Opinions differ as to the temperature which is indicated by t...

Affinity Of Nickel Steel For Carbon
The carbon- and nickel-steel gears are carburized separately...

Care In Annealing
Not only will benefits in machining be found by careful anne...

Hardening
Steel is hardened by quenching from above the upper critical....

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

A Chromium-cobalt Steel
The Latrobe Steel Company make a high-speed steel without tun...

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

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

Knowing What Takes Place
How are we to know if we have given a piece of steel the ver...

Flange Shields For Furnaces
Such portable flame shields as the one illustrated in Fig. 1...



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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