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Steel Making

The Thermo-couple
With the application of the thermo-couple, the measurement of...

Open Hearth Process
The open hearth furnace consists of a big brick room with a l...

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

Properties Of Alloy Steels
The following table shows the percentages of carbon, manganes...

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

The Effect Of Tempering On Water-quenched Gages
The following information has been supplied by Automatic and ...

Quenching Tool Steel
To secure proper hardness, the cooling of quenching of steel ...

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

Manganese adds considerably to the tensile strength of steel,...

Protectors For Thermo-couples
Thermo-couples must be protected from the danger of mechanica...

Heavy Forging Practice
In heavy forging practice where the metal is being worked at...

Blending The Compound
Essentially, this consists of the sturdy, power-driven separa...

Surface Carburizing
Carburizing, commonly called case-hardening, is the art of pr...

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

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

A Chromium-cobalt Steel
The Latrobe Steel Company make a high-speed steel without tun...

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

The material used for all gears on the Liberty engine was sel...

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

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

The Care Of Carburizing Compounds


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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