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Steel Making

Cutting-off Steel From Bar
To cut a piece from an annealed bar, cut off with a hack saw,...

Making Steel Balls
Steel balls are made from rods or coils according to size, st...

Gas Consumption For Carburizing
Although the advantages offered by the gas-fired furnace for ...

High-carbon Machinery Steel
The carbon content of this steel is above 30 points and is ha...

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

Vanadium
Vanadium has a very marked effect upon alloy steels rich in c...

Refining The Grain
This is remedied by reheating the piece to a temperature slig...

Conclusions
Martien was probably never a serious contender for the honor ...

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

Drop Forging Dies
The kind of steel used in the die of course influences the he...

Machineability
Reheating for machine ability was done at 100 deg. less than ...

Corrosion
This steel like any other steel when distorted by cold worki...

Knowing What Takes Place
How are we to know if we have given a piece of steel the ver...

A Chromium-cobalt Steel
The Latrobe Steel Company make a high-speed steel without tun...

Steel For Chisels And Punches
The highest grades of carbon or tempering steels are to be re...

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

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

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

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

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



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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