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Restoring Overheated Steel
The effect of heat treatment on overheated steel is shown gra...

Pyrometers
Armor plate makers sometimes use the copper ball or Siemens' ...

Alloying Elements
Commercial steels of even the simplest types are therefore p...

Carburizing Low-carbon Sleeves
Low-carbon sleeves are carburized and pushed on malleable-ir...

Highly Stressed Parts
The highly stressed parts on the Liberty engine consisted of ...

Application To The Automotive Industry
The information given on the various parts of the Liberty eng...

The Modern Hardening Room
A hardening room of today means a very different place from ...

Standard Analysis
The selection of a standard analysis by the manufacturer is t...

Quenching The Work
In some operations case-hardened work is quenched from the bo...

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

Conclusions
Martien was probably never a serious contender for the honor ...

Steel For Chisels And Punches
The highest grades of carbon or tempering steels are to be re...

Leeds And Northrup Optical Pyrometer
The principles of this very popular method of measuring tempe...

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

Calibration Of Pyrometer With Common Salt
An easy and convenient method for standardization and one whi...

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

Forging High-speed Steel
Heat very slowly and carefully to from 1,800 to 2,000 deg.F....

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

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

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



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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