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   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

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

Making Steel Balls
Steel balls are made from rods or coils according to size, st...

Take Time For Hardening
Uneven heating and poor quenching has caused loss of many ve...

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

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

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

Alloying Elements
Commercial steels of even the simplest types are therefore p...

Carbon-steel Forgings
Low-stressed, carbon-steel forgings include such parts as car...

The Effect Of Tempering On Water-quenched Gages
The following information has been supplied by Automatic and ...

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

Pickling The Forgings
The forgings were then pickled in a hot solution of either ni...

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

A Satisfactory Luting Mixture
A mixture of fireclay and sand will be found very satisfactor...

Restoring Overheated Steel
The effect of heat treatment on overheated steel is shown gra...

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

Heating
Although it is possible to work steels cold, to an extent de...

Tool Or Crucible Steel
Crucible steel can be annealed either in muffled furnace or b...

Short Method Of Treatment
In the new method, the packed pots are run into the case-har...

Surface Carburizing
Carburizing, commonly called case-hardening, is the art of pr...

The Penetration Of Carbon
Carburized mild steel is used to a great extent in the manufa...



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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