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Steel Making

William Kelly's Air-boiling Process
An account of Bessemer's address to the British Association w...

Case-hardening Treatments For Various Steels
Plain water, salt water and linseed oil are the three most co...

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

Bessemer Process
The bessemer process consists of charging molten pig iron int...

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

Effect Of Different Carburizing Material
[Illustrations: FIGS. 33 to 37.] Each of these different p...

Blending The Compound
Essentially, this consists of the sturdy, power-driven separa...

Rate Of Absorption
According to Guillet, the absorption of carbon is favored by ...

Phosphorus
Phosphorus is one of the impurities in steel, and it has been...

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

Flange Shields For Furnaces
Such portable flame shields as the one illustrated in Fig. 1...

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

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...

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

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

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

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

Temperatures To Use
As soon as the temperature of the steel reaches 100 deg.C. (...

Protectors For Thermo-couples
Thermo-couples must be protected from the danger of mechanica...



Heat Treatment Of Steel






Category: HEAT TREATMENT OF STEEL

Heat treatment consists in heating and cooling metal at definite
rates in order to change its physical condition. Many objects may
be attained by correct heat treatment, but nothing much can be
expected unless the man who directs the operations knows what is
the essential difference in a piece of steel at room temperature
and at a red heat, other than the obvious fact that it is hot. The
science of metallography has been developed in the past 25 years,
and aided by precise methods of measuring temperature, has done
much to systematize the information which we possess on metallic
alloys, and steel in particular.





Next: Critical Points

Previous: Blending The Compound



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