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Steel Making

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

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

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

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

Piston Pin
The piston pin on an aviation engine must possess maximum res...

Crucible Steel
Crucible steel is still made by melting material in a clay or...

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

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

Heat Treatment Of Punches And Dies Shears Taps Etc
HEATING.--The degree to which tools of the above classes shou...

A Satisfactory Luting Mixture
A mixture of fireclay and sand will be found very satisfactor...

Carbon Tool Steel
Heat to a bright red, about 1,500 to 1,550 deg.F. Do not ham...

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

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

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

Tempering Round Dies
A number of circular dies of carbon tool steel for use in too...

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

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

Restoring Overheated Steel
The effect of heat treatment on overheated steel is shown gra...

Classifications Of Steel
Among makers and sellers, carbon tool-steels are classed by g...

Leeds And Northrup Optical Pyrometer
The principles of this very popular method of measuring tempe...



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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