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Steel Making

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

The Penetration Of Carbon
Carburized mild steel is used to a great extent in the manufa...

Nickel-chromium
A combination of the characteristics of nickel and the charac...

Optical System And Electrical Circuit Of The Leeds & Northrup Optical Pyrometer
For extremely high temperature, the optical pyrometer is lar...

Tensile Properties
Strength of a metal is usually expressed in the number of pou...

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

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

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

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

Preventing Carburizing By Copper-plating
Copper-plating has been found effective and must have a thick...

Carburizing By Gas
The process of carburizing by gas, briefly mentioned on page ...

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

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

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...

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

An Automatic Temperature Control Pyrometer
Automatic temperature control instruments are similar to the ...

Separating The Work From The Compound
During the pulling of the heat, the pots are dumped upon a ca...

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

Protective Screens For Furnaces
Workmen needlessly exposed to the flames, heat and glare from...

Annealing Of Rifle Components At Springfield Armory
In general, all forgings of the components of the arms manufa...



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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