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Steel Making

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

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

Heat-treating Department
The heat-treating department occupies an L-shaped building. ...

Mushet And Bessemer
That Mushet was "used" by Ebbw Vale against Bessemer is, perh...

High Speed Steel
For centuries the secret art of making tool steel was handed ...

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

Annealing In Bone
Steel and cast iron may both be annealed in granulated bone. ...

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

Heat Treatment Of Milling Cutters Drills Reamers Etc
THE FIRE.--Gas and electric furnaces designed for high heats ...

Tempering Round Dies
A number of circular dies of carbon tool steel for use in too...

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

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

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

Case-hardening Treatments For Various Steels
Plain water, salt water and linseed oil are the three most co...

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

Compensating Leads
By the use of compensating leads, formed of the same materia...

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

Steel Can Be Worked Cold
As noted above, steel can be worked cold, as in the case of ...

The Packing Department
In Fig. 56 is shown the packing pots where the work is packe...

Placing The Thermo-couples
The following illustrations from the Taylor Instrument Compan...



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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