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Steel Making

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

Sulphur is another impurity and high sulphur is even a greate...

Nickel may be considered as the toughest among the non-rare a...

Steel is hardened by quenching from above the upper critical....

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

Hardening High-speed Steel
In forging use coke for fuel in the forge. Heat steel slowly ...

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

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

Properties Of Steel
Steels are known by certain tests. Early tests were more or l...

Reheating for machine ability was done at 100 deg. less than ...

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

The Effect
The heating at 1,600 deg.F. gives the first heat treatment w...

Molybdenum steels have been made commercially for twenty-five...

Introduction Of Carbon
The matter to which these notes are primarily directed is the...

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

Phosphorus is one of the impurities in steel, and it has been...

The forgings can be hardened by cooling in still air or quen...

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

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

Annealing Alloy Steel
The term alloy steel, from the steel maker's point of view, r...

The Care Of Carburizing Compounds


Of all the opportunities for practicing economy in the heat-treatment
department, there is none that offers greater possibilities for
profitable returns than the systematic cleaning, blending and reworking
of artificial carburizers, or compounds.

The question of whether or not it is practical to take up the work
depends upon the nature of the output. If the sole product of the
hardening department consists of a 1.10 carbon case or harder,
requiring a strong highly energized material of deep penetrative
power such as that used in the carburizing of ball races, hub-bearings
and the like, it would be best to dispose of the used material to
some concern whose product requires a case with from 0.70 to 0.90
carbon, but where there is a large variety of work the compound
may be so handled that there will be practically no waste.

This is accomplished with one of the most widely known artificial
carburizers by giving all the compound in the plant three distinct
classifications: New, being direct from the maker; half and
half, being one part of new and one part first run; and 2 to 1,
which consists of two parts of old and one part new.

Next: Separating The Work From The Compound

Previous: Gas Consumption For Carburizing

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