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

Steel Making

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

Quenching The Work
In some operations case-hardened work is quenched from the bo...

Steel Worked In Austenitic State
As a general rule steel should be worked when it is in the a...

Hints For Tool Steel Users
Do not hesitate to ask for information from the maker as to t...

Steel Before The 1850's
In spite of a rapid increase in the use of machines and the ...

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

Preventing Decarbonization Of Tool Steel
It is especially important to prevent decarbonization in such...

Annealing To Relieve Internal Stresses
Work quenched from a high temperature and not afterward tempe...

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

Heat Treatment Of Milling Cutters Drills Reamers Etc
THE FIRE.--Gas and electric furnaces designed for high heats ...

Brown Automatic Signaling Pyrometer
In large heat-treating plants it has been customary to mainta...

The Electric Process
The fourth method of manufacturing steel is by the electric f...

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

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

Annealing
There is no mystery or secret about the proper annealing of d...

Impact Tests
Impact tests are of considerable importance as an indication ...

Leeds And Northrup Optical Pyrometer
The principles of this very popular method of measuring tempe...

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

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

Alloying Elements
Commercial steels of even the simplest types are therefore p...



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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