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

Steel Making

Refining The Grain
This is remedied by reheating the piece to a temperature slig...

Cutting-off Steel From Bar
To cut a piece from an annealed bar, cut off with a hack saw,...

Testing And Inspection Of Heat Treatment
The hard parts of the gear must be so hard that a new mill f...

Composition Of Transmission-gear Steel
If the nickel content of this steel is eliminated, and the pe...

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

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

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

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

Phosphorus
PHOSPHORUS is an element (symbol P) which enters the metal fr...

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

Manganese
MANGANESE is a metal much like iron. Its chemical symbol is M...

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

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

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

The Care Of Carburizing Compounds
Of all the opportunities for practicing economy in the heat-t...

The Packing Department
In Fig. 56 is shown the packing pots where the work is packe...

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

High Speed Steel
For centuries the secret art of making tool steel was handed ...

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

The Penetration Of Carbon
Carburized mild steel is used to a great extent in the manufa...



The Care Of Carburizing Compounds






Category: CASE-HARDENING OR SURFACE-CARBURIZING

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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