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

Steel Making

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

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

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

Tungsten
Tungsten, as an alloy in steel, has been known and used for a...

Gas Consumption For Carburizing
Although the advantages offered by the gas-fired furnace for ...

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

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

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

Robert Mushet
Robert (Forester) Mushet (1811-1891), born in the Forest of D...

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

Carbon Steels For Different Tools
All users of tool steels should carefully study the different...

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

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

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

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

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

The Leeds And Northrup Potentiometer System
The potentiometer pyrometer system is both flexible and subst...

Ebbw Vale And The Bessemer Process
After his British Association address in August 1856, Besseme...

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

Effect Of Different Carburizing Material
[Illustrations: FIGS. 33 to 37.] Each of these different p...



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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