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

Steel Making

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

Affinity Of Nickel Steel For Carbon
The carbon- and nickel-steel gears are carburized separately...

Connecting Rods
The material used for all connecting rods on the Liberty engi...

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

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

Complete Calibration Of Pyrometers
For the complete calibration of a thermo-couple of unknown e...

Non-shrinking Oil-hardening Steels
Certain steels have a very low rate of expansion and contract...

Correction By Zero Adjustment
Many pyrometers are supplied with a zero adjuster, by means ...

Placing Of Pyrometers
When installing a pyrometer, care should be taken that it re...

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

Heat Treatment Of Lathe Planer And Similar Tools
FIRE.--For these tools a good fire is one made of hard foundr...

Impact Tests
Impact tests are of considerable importance as an indication ...

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

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

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

A Chromium-cobalt Steel
The Latrobe Steel Company make a high-speed steel without tun...

Annealing Work
With the exception of several of the higher types of alloy s...

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

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

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



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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