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   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

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

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

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

Annealing Work
With the exception of several of the higher types of alloy s...

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

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

Robert Mushet
Robert (Forester) Mushet (1811-1891), born in the Forest of D...

Cyanide Bath For Tool Steels
All high-carbon tool steels are heated in a cyanide bath. Wi...

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

Application Of Liberty Engine Materials To The Automotive Industry
The success of the Liberty engine program was an engineer...

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

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

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

Properties Of Steel
Steels are known by certain tests. Early tests were more or l...

Pyrometers For Molten Metal
Pyrometers for molten metal are connected to portable thermoc...

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

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

Phosphorus
PHOSPHORUS is an element (symbol P) which enters the metal fr...

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

Calibration Of Pyrometer With Common Salt
An easy and convenient method for standardization and one whi...



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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