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

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

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

Mushet And Bessemer
That Mushet was "used" by Ebbw Vale against Bessemer is, perh...

Complete Calibration Of Pyrometers
For the complete calibration of a thermo-couple of unknown e...

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

Blending The Compound
Essentially, this consists of the sturdy, power-driven separa...

Affinity Of Nickel Steel For Carbon
The carbon- and nickel-steel gears are carburized separately...

Conclusions
Martien was probably never a serious contender for the honor ...

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

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

Gears
The material used for all gears on the Liberty engine was sel...

Silicon
Silicon prevents, to a large extent, defects such as gas bubb...

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

The Thermo-couple
With the application of the thermo-couple, the measurement of...

Carburizing By Gas
The process of carburizing by gas, briefly mentioned on page ...

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

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

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

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



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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