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Steel Making

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

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

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

Judging The Heat Of Steel
While the use of a pyrometer is of course the only way to hav...

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

Silicon
Silicon prevents, to a large extent, defects such as gas bubb...

Temperature For Annealing
Theoretically, annealing should be accomplished at a tempera...

Preventing Carburizing By Copper-plating
Copper-plating has been found effective and must have a thick...

Hardening High-speed Steels
We will now take up the matter of hardening high-speed steels...

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

Nickel-chromium
A combination of the characteristics of nickel and the charac...

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

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

Sulphur
SULPHUR is another element (symbol S) which is always found i...

Hardness Testing
The word hardness is used to express various properties of me...

The Pyrometer And Its Use
In the heat treatment of steel, it has become absolutely nece...

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

Composition And Properties Of Steel
It is a remarkable fact that one can look through a dozen tex...

Annealing Of Rifle Components At Springfield Armory
In general, all forgings of the components of the arms manufa...

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



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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