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

Cyanide Bath For Tool Steels
All high-carbon tool steels are heated in a cyanide bath. Wi...

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

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

Connecting Rods
The material used for all connecting rods on the Liberty engi...

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

The Pyrometer And Its Use
In the heat treatment of steel, it has become absolutely nece...

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

Effects Of Proper Annealing
Proper annealing of low-carbon steels causes a complete solu...

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

Pyrometry And Pyrometers
A knowledge of the fundamental principles of pyrometry, or th...

Furnace Data
In order to give definite information concerning furnaces, fu...

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

Heating Of Manganese Steel
Another form of heat-treating furnace is that which is used ...

Pyrometers
Armor plate makers sometimes use the copper ball or Siemens' ...

The Leeds And Northrup Potentiometer System
The potentiometer pyrometer system is both flexible and subst...

Nickel-chromium
A combination of the characteristics of nickel and the charac...

Temperature For Annealing
Theoretically, annealing should be accomplished at a tempera...

Annealing Of High-speed Steel
For annealing high-speed steel, some makers recommend using g...

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



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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