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Steel Making

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

The Pyrometer And Its Use
In the heat treatment of steel, it has become absolutely nece...

Instructions For Working High-speed Steel
Owing to the wide variations in the composition of high-speed...

Process Of Carburizing
Carburizing imparts a shell of high-carbon content to a low-...

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

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

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

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

Temperature Recording And Regulation
Each furnace is equipped with pyrometers, but the reading an...

Annealing To Relieve Internal Stresses
Work quenched from a high temperature and not afterward tempe...

Carbon Tool Steel
Heat to a bright red, about 1,500 to 1,550 deg.F. Do not ham...

Highly Stressed Parts
The highly stressed parts on the Liberty engine consisted of ...

The Forging Of Steel
So much depends upon the forging of steel that this operation...

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

Typical Oil-fired Furnaces
Several types of standard oil-fired furnaces are shown herew...

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

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

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

Plant For Forging Rifle Barrels
The forging of rifle barrels in large quantities and heat-tre...

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



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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