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

Steel Making

Hardening Carbon Steel For Tools
For years the toolmaker had full sway in regard to make of st...

Carburizing Low-carbon Sleeves
Low-carbon sleeves are carburized and pushed on malleable-ir...

Carburizing Material
The simplest carburizing substance is charcoal. It is also th...

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

Preventing Cracks In Hardening
The blacksmith in the small shop, where equipment is usually ...

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

Short Method Of Treatment
In the new method, the packed pots are run into the case-har...

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

Pickling The Forgings
The forgings were then pickled in a hot solution of either ni...

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

Classifications Of Steel
Among makers and sellers, carbon tool-steels are classed by g...

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

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

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

Take Time For Hardening
Uneven heating and poor quenching has caused loss of many ve...

Crankshaft
The crankshaft was the most highly stressed part of the entir...

Placing Of Pyrometers
When installing a pyrometer, care should be taken that it re...

Oil-hardening Steel
Heat slowly and uniformly to 1,450 deg.F. and forge thorough...

Tungsten
Tungsten, as an alloy in steel, has been known and used for a...

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



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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