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

Suggestions For Handling High-speed Steels
The following suggestions for handling high-speed steels are ...

Preparing Parts For Local Case-hardening
At the works of the Dayton Engineering Laboratories Company, ...

Steel Before The 1850's
In spite of a rapid increase in the use of machines and the ...

Pickling The Forgings
The forgings were then pickled in a hot solution of either ni...

Silicon
SILICON is a very widespread element (symbol Si), being an es...

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

Tensile Properties
Strength of a metal is usually expressed in the number of pou...

Annealing Method
Forgings which are too hard to machine are put in pots with ...

Take Time For Hardening
Uneven heating and poor quenching has caused loss of many ve...

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

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

Protectors For Thermo-couples
Thermo-couples must be protected from the danger of mechanica...

Rate Of Cooling
At the option of the manufacturer, the above treatment of gea...

Heat Treatment Of Axles
Parts of this general type should be heat-treated to show the...

Carbon In Tool Steel
Carbon tool steel, or tool steel as it is commonly called, us...

The Effect Of Tempering On Water-quenched Gages
The following information has been supplied by Automatic and ...

Making Steel Balls
Steel balls are made from rods or coils according to size, st...

Shrinking And Enlarging Work
Steel can be shrunk or enlarged by proper heating and cooling...

Knowing What Takes Place
How are we to know if we have given a piece of steel the ver...



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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