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Steel Making

Highly Stressed Parts
The highly stressed parts on the Liberty engine consisted of ...

Protective Screens For Furnaces
Workmen needlessly exposed to the flames, heat and glare from...

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

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

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

A Chromium-cobalt Steel
The Latrobe Steel Company make a high-speed steel without tun...

Optical System And Electrical Circuit Of The Leeds & Northrup Optical Pyrometer
For extremely high temperature, the optical pyrometer is lar...

Forging High-speed Steel
Heat very slowly and carefully to from 1,800 to 2,000 deg.F....

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

Typical Oil-fired Furnaces
Several types of standard oil-fired furnaces are shown herew...

Placing The Thermo-couples
The following illustrations from the Taylor Instrument Compan...

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

Correction For Cold-junction Errors
The voltage generated by a thermo-couple of an electric pyrom...

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

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

Process Of Carburizing
Carburizing imparts a shell of high-carbon content to a low-...

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

Chrome-nickel Steel
Forging heat of chrome-nickel steel depends very largely on ...

The Care Of Carburizing Compounds
Of all the opportunities for practicing economy in the heat-t...

Molybdenum
Molybdenum steels have been made commercially for twenty-five...



Non-shrinking Oil-hardening Steels






Category: ALLOYS AND THEIR EFFECT UPON STEEL

Certain steels have a very low rate of expansion and contraction
in hardening and are very desirable for test plugs, gages, punches
and dies, for milling cutters, taps, reamers, hard steel bushings
and similar work.

It is recommended that for forging these steels it be heated slowly
and uniformly to a bright red, but not in a direct flame or blast.
Harden at a dull red heat, about 1,300 deg.F. A clean coal or coke
fire, or a good muffle-gas furnace will give best results. Fish
oil is good for quenching although in some cases warm water will
give excellent results. The steel should be kept moving in the bath
until perfectly cold. Heated and cooled in this way the steel is
very tough, takes a good cutting edge and has very little expansion
or contraction which makes it desirable for long taps where the
accuracy of lead is important.

The composition of these steels is as follows:

Per cent
Manganese 1.40 to 1.60
Carbon 0.80 to 0.90
Vanadium 0.20 to 0.25





Next: Effect Of A Small Amount Of Copper In Medium-carbon Steel

Previous: Properties Of Alloy Steels



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