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Steel Making

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

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

Composition And Properties Of Steel
It is a remarkable fact that one can look through a dozen tex...

Although it is possible to work steels cold, to an extent de...

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

High-carbon Machinery Steel
The carbon content of this steel is above 30 points and is ha...

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

Short Method Of Treatment
In the new method, the packed pots are run into the case-har...

Oil-hardening Steel
Heat slowly and uniformly to 1,450 deg.F. and forge thorough...

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

Liberty Motor Connecting Rods
The requirements for materials for the Liberty motor connecti...

Composition Of Transmission-gear Steel
If the nickel content of this steel is eliminated, and the pe...

Annealing Work
With the exception of several of the higher types of alloy s...

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

Carbon-steel Forgings
Low-stressed, carbon-steel forgings include such parts as car...

Flange Shields For Furnaces
Such portable flame shields as the one illustrated in Fig. 1...

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

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

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

Correction For Cold-junction Errors
The voltage generated by a thermo-couple of an electric pyrom...

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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