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Steel Making

Detrimental Elements
Sulphur and phosphorus are two elements known to be detrimen...

Carburizing By Gas
The process of carburizing by gas, briefly mentioned on page ...

Double Annealing
Water annealing consists in heating the piece, allowing it to...

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

Annealing Of High-speed Steel
For annealing high-speed steel, some makers recommend using g...

Air-hardening Steels
These steels are recommended for boring, turning and planing...

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

Molybdenum
Molybdenum steels have been made commercially for twenty-five...

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

S A E Heat Treatments
The Society of Automotive Engineers have adopted certain heat...

Non-shrinking Oil-hardening Steels
Certain steels have a very low rate of expansion and contract...

Bessemer Process
The bessemer process consists of charging molten pig iron int...

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

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

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

Care In Annealing
Not only will benefits in machining be found by careful anne...

Hardening High-speed Steel
In forging use coke for fuel in the forge. Heat steel slowly ...

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

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

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



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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