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Steel Making

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

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

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

The Quenching Tank
The quenching tank is an important feature of apparatus in c...

Nickel
Nickel may be considered as the toughest among the non-rare a...

Forging High-speed Steel
Heat very slowly and carefully to from 1,800 to 2,000 deg.F....

Quality And Structure
The quality of high-speed steel is dependent to a very great ...

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

Protectors For Thermo-couples
Thermo-couples must be protected from the danger of mechanica...

Open Hearth Process
The open hearth furnace consists of a big brick room with a l...

Correction By Zero Adjustment
Many pyrometers are supplied with a zero adjuster, by means ...

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

Preventing Decarbonization Of Tool Steel
It is especially important to prevent decarbonization in such...

Placing Of Pyrometers
When installing a pyrometer, care should be taken that it re...

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

Composition Of Transmission-gear Steel
If the nickel content of this steel is eliminated, and the pe...

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

Highly Stressed Parts
The highly stressed parts on the Liberty engine consisted of ...

Standard Analysis
The selection of a standard analysis by the manufacturer is t...

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



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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