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Steel Making

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

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

Brown Automatic Signaling Pyrometer
In large heat-treating plants it has been customary to mainta...

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

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

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

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

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

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

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

Liberty Motor Connecting Rods
The requirements for materials for the Liberty motor connecti...

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

The Thermo-couple
With the application of the thermo-couple, the measurement of...

Steel Can Be Worked Cold
As noted above, steel can be worked cold, as in the case of ...

Composition And Properties Of Steel
It is a remarkable fact that one can look through a dozen tex...

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

Oil-hardening Steel
Heat slowly and uniformly to 1,450 deg.F. and forge thorough...

Calibration Of Pyrometer With Common Salt
An easy and convenient method for standardization and one whi...

Complete Calibration Of Pyrometers
For the complete calibration of a thermo-couple of unknown e...

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



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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