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

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

Annealing Method
Forgings which are too hard to machine are put in pots with ...

Carburizing Low-carbon Sleeves
Low-carbon sleeves are carburized and pushed on malleable-ir...

Heat-treating Department
The heat-treating department occupies an L-shaped building. ...

The Leeds And Northrup Potentiometer System
The potentiometer pyrometer system is both flexible and subst...

Annealing Alloy Steel
The term alloy steel, from the steel maker's point of view, r...

Detrimental Elements
Sulphur and phosphorus are two elements known to be detrimen...

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

The Modern Hardening Room
A hardening room of today means a very different place from ...

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

Manganese
Manganese adds considerably to the tensile strength of steel,...

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

The Electric Process
The fourth method of manufacturing steel is by the electric f...

Placing The Thermo-couples
The following illustrations from the Taylor Instrument Compan...

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

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

Compensating Leads
By the use of compensating leads, formed of the same materia...

The Packing Department
In Fig. 56 is shown the packing pots where the work is packe...

Heating Of Manganese Steel
Another form of heat-treating furnace is that which is used ...



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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