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Steel Making

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

Correction For Cold-junction Errors
The voltage generated by a thermo-couple of an electric pyrom...

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

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

Shrinking And Enlarging Work
Steel can be shrunk or enlarged by proper heating and cooling...

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

Judging The Heat Of Steel
While the use of a pyrometer is of course the only way to hav...

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

Preparing Parts For Local Case-hardening
At the works of the Dayton Engineering Laboratories Company, ...

Effect Of A Small Amount Of Copper In Medium-carbon Steel
This shows the result of tests by C. R. Hayward and A. B. Joh...

The Influence Of Size
The size of the piece influences the physical properties obta...

Quenching Tool Steel
To secure proper hardness, the cooling of quenching of steel ...

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

Heat-treating Equipment And Methods For Mass Production
The heat-treating department of the Brown-Lipe-Chapin Company...

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

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

Instructions For Working High-speed Steel
Owing to the wide variations in the composition of high-speed...

Machineability
Reheating for machine ability was done at 100 deg. less than ...

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

For Milling Cutters And Formed Tools
FORGING.--Forge as before.--ANNEALING.--Place the steel in 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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