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Steel Making

Shrinking And Enlarging Work
Steel can be shrunk or enlarged by proper heating and cooling...

Hints For Tool Steel Users
Do not hesitate to ask for information from the maker as to t...

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

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

Vanadium has a very marked effect upon alloy steels rich in c...

Composition Of Transmission-gear Steel
If the nickel content of this steel is eliminated, and the pe...

Double Annealing
Water annealing consists in heating the piece, allowing it to...

Rate Of Absorption
According to Guillet, the absorption of carbon is favored by ...

Hardening High-speed Steels
We will now take up the matter of hardening high-speed steels...

The Forging Of Steel
So much depends upon the forging of steel that this operation...

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

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

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

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

Testing And Inspection Of Heat Treatment
The hard parts of the gear must be so hard that a new mill f...

The forgings can be hardened by cooling in still air or quen...

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

S A E Heat Treatments
The Society of Automotive Engineers have adopted certain heat...

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

The Effect
The heating at 1,600 deg.F. gives the first heat treatment w...

Non-shrinking Oil-hardening Steels


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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