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Steel Making

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

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

Carbon In Tool Steel
Carbon tool steel, or tool steel as it is commonly called, us...

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

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

An Automatic Temperature Control Pyrometer
Automatic temperature control instruments are similar to the ...

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

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

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

Quenching
It is considered good practice to quench alloy steels from th...

Heat Treatment Of Steel
Heat treatment consists in heating and cooling metal at defin...

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

Non-shrinking Oil-hardening Steels
Certain steels have a very low rate of expansion and contract...

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

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

Quenching Tool Steel
To secure proper hardness, the cooling of quenching of steel ...

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

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

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

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



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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