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Steel Making

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

Uses Of The Various Tempers Of Carbon Tool Steel
DIE TEMPER.--No. 3: All kinds of dies for deep stamping, pres...

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

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

Plant For Forging Rifle Barrels
The forging of rifle barrels in large quantities and heat-tre...

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

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

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

Tempering Colors On Carbon Steels
Opinions differ as to the temperature which is indicated by t...

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

Phosphorus
PHOSPHORUS is an element (symbol P) which enters the metal fr...

Using Illuminating Gas
The choice of a carburizing furnace depends greatly on the fa...

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

Lathe And Planer Tools
TO FORGE.--Gently warm the steel to remove any chill is parti...

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

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

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

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

Detrimental Elements
Sulphur and phosphorus are two elements known to be detrimen...

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



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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