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Steel Making

Correction By Zero Adjustment
Many pyrometers are supplied with a zero adjuster, by means ...

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

Typical Oil-fired Furnaces
Several types of standard oil-fired furnaces are shown herew...

Critical Points
One of the most important means of investigating the properti...

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

High Speed Steel
For centuries the secret art of making tool steel was handed ...

Hardening
Steel is hardened by quenching from above the upper critical....

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

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

Rate Of Cooling
At the option of the manufacturer, the above treatment of gea...

Annealing Method
Forgings which are too hard to machine are put in pots with ...

Heat Treatment Of Axles
Parts of this general type should be heat-treated to show the...

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

Chromium
Chromium when alloyed with steel, has the characteristic func...

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

Fatigue Tests
It has been known for fifty years that a beam or rod would fa...

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

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

Composition And Properties Of Steel
It is a remarkable fact that one can look through a dozen tex...

Judging The Heat Of Steel
While the use of a pyrometer is of course the only way to hav...



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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