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Steel Making

Crucible Steel
Crucible steel is still made by melting material in a clay or...

The Electric Process
The fourth method of manufacturing steel is by the electric f...

Steel Worked In Austenitic State
As a general rule steel should be worked when it is in the a...

This steel like any other steel when distorted by cold worki...

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

Preventing Decarbonization Of Tool Steel
It is especially important to prevent decarbonization in such...

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

Instructions For Working High-speed Steel
Owing to the wide variations in the composition of high-speed...

Fatigue Tests
It has been known for fifty years that a beam or rod would fa...

Using Illuminating Gas
The choice of a carburizing furnace depends greatly on the fa...

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

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

The Theory Of Tempering
Steel that has been hardened is generally harder and more br...

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

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

Effect Of A Small Amount Of Copper In Medium-carbon Steel
This shows the result of tests by C. R. Hayward and A. B. Joh...

Drop Forging Dies
The kind of steel used in the die of course influences the he...

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

Properties Of Alloy Steels
The following table shows the percentages of carbon, manganes...

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



Molybdenum steels have been made commercially for twenty-five years,
but they have not been widely exploited until since the war. Very
large resources of molybdenum have been developed in America, and
the mining companies who are equipped to produce the metal are
very active in advertising the advantages of molybdenum steels.

It was early found that 1 part molybdenum was the equivalent of from
2 to 2-1/2 parts of tungsten in tool steels, and magnet steels. It
fell into disrepute as an alloy for high-speed tool steel, however,
because it was found that the molybdenum was driven out of the
surface of the tool during forging and heat treating.

Within the last few years it has been found that the presence of
less than 1 per cent of molybdenum greatly enhances certain properties
of heat-treated carbon and alloy steels used for automobiles and
high-grade machinery.

In general, molybdenum when added to an alloy steel, increases the
figure for reduction of area, which is considered a good measure
of toughness. Molybdenum steels are also relatively insensible
to variations in heat treatment; that is to say, a
chromium-nickel-molybdenum steel after quenching in oil from 1,450 deg.F.
may be drawn at any temperature between 900 and 1,100 deg.F. with
substantially the same result (static tensile properties and hardness).

Next: Silicon

Previous: Tungsten

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