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

Steel Making

High-carbon Machinery Steel
The carbon content of this steel is above 30 points and is ha...

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

Testing And Inspection Of Heat Treatment
The hard parts of the gear must be so hard that a new mill f...

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

Annealing In Bone
Steel and cast iron may both be annealed in granulated bone. ...

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

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

Pickling The Forgings
The forgings were then pickled in a hot solution of either ni...

Mushet And Bessemer
That Mushet was "used" by Ebbw Vale against Bessemer is, perh...

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

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

Heat Treatment Of Lathe Planer And Similar Tools
FIRE.--For these tools a good fire is one made of hard foundr...

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

Ebbw Vale And The Bessemer Process
After his British Association address in August 1856, Besseme...

Heat Treatment Of Milling Cutters Drills Reamers Etc
THE FIRE.--Gas and electric furnaces designed for high heats ...

Gas Consumption For Carburizing
Although the advantages offered by the gas-fired furnace for ...

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

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

Hardening Operation
Hardening a gear is accomplished as follows: The gear is tak...

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



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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