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Steel Making

Separating The Work From The Compound
During the pulling of the heat, the pots are dumped upon a ca...

Carburizing Material
The simplest carburizing substance is charcoal. It is also th...

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

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

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

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

The Influence Of Size
The size of the piece influences the physical properties obta...

Liberty Motor Connecting Rods
The requirements for materials for the Liberty motor connecti...

Flange Shields For Furnaces
Such portable flame shields as the one illustrated in Fig. 1...

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

Composition And Properties Of Steel
It is a remarkable fact that one can look through a dozen tex...

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

Plant For Forging Rifle Barrels
The forging of rifle barrels in large quantities and heat-tre...

Heat Treatment Of Gear Blanks
This section is based on a paper read before the American Gea...

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

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

Pyrometers
Armor plate makers sometimes use the copper ball or Siemens' ...

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

Effects Of Proper Annealing
Proper annealing of low-carbon steels causes a complete solu...

Air-hardening Steels
These steels are recommended for boring, turning and planing...



Molybdenum






Category: ALLOYS AND THEIR EFFECT UPON STEEL

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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