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Steel Making

Application Of Liberty Engine Materials To The Automotive Industry
The success of the Liberty engine program was an engineer...

Heavy Forging Practice
In heavy forging practice where the metal is being worked at...

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

Chromium
Chromium when alloyed with steel, has the characteristic func...

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

For Milling Cutters And Formed Tools
FORGING.--Forge as before.--ANNEALING.--Place the steel in a ...

High-chromium Or Rust-proof Steel
High-chromium, or what is called stainless steel containing f...

Judging The Heat Of Steel
While the use of a pyrometer is of course the only way to hav...

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

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

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

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

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

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

Hardening Operation
Hardening a gear is accomplished as follows: The gear is tak...

Pyrometers For Molten Metal
Pyrometers for molten metal are connected to portable thermoc...

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

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

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

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



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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