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Steel Making

High-chromium Or Rust-proof Steel
High-chromium, or what is called stainless steel containing f...

Heat Treatment Of Lathe Planer And Similar Tools
FIRE.--For these tools a good fire is one made of hard foundr...

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

Piston Pin
The piston pin on an aviation engine must possess maximum res...

Carbon Steels For Different Tools
All users of tool steels should carefully study the different...

Steel For Chisels And Punches
The highest grades of carbon or tempering steels are to be re...

Carburizing Low-carbon Sleeves
Low-carbon sleeves are carburized and pushed on malleable-ir...

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

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

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

Annealing Method
Forgings which are too hard to machine are put in pots with ...

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

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

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

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

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

Pyrometers For Molten Metal
Pyrometers for molten metal are connected to portable thermoc...

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

Carburizing Material
The simplest carburizing substance is charcoal. It is also th...

Using Illuminating Gas
The choice of a carburizing furnace depends greatly on the fa...

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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