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

Annealing
ANNEALING can be done by heating to temperatures ranging from...

An Automatic Temperature Control Pyrometer
Automatic temperature control instruments are similar to the ...

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

Cyanide Bath For Tool Steels
All high-carbon tool steels are heated in a cyanide bath. Wi...

Heating Of Manganese Steel
Another form of heat-treating furnace is that which is used ...

Rate Of Cooling
At the option of the manufacturer, the above treatment of gea...

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

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

Effects Of Proper Annealing
Proper annealing of low-carbon steels causes a complete solu...

A Satisfactory Luting Mixture
A mixture of fireclay and sand will be found very satisfactor...

The Theory Of Tempering
Steel that has been hardened is generally harder and more br...

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

Hardening Operation
Hardening a gear is accomplished as follows: The gear is tak...

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

Tensile Properties
Strength of a metal is usually expressed in the number of pou...

Furnace Data
In order to give definite information concerning furnaces, fu...

Preventing Decarbonization Of Tool Steel
It is especially important to prevent decarbonization in such...

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

Preparing Parts For Local Case-hardening
At the works of the Dayton Engineering Laboratories Company, ...



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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