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Steel Making

Shrinking And Enlarging Work
Steel can be shrunk or enlarged by proper heating and cooling...

Introduction Of Carbon
The matter to which these notes are primarily directed is the...

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

Crucible Steel
Crucible steel is still made by melting material in a clay or...

Sulphur
Sulphur is another impurity and high sulphur is even a greate...

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

Phosphorus
PHOSPHORUS is an element (symbol P) which enters the metal fr...

Critical Points
One of the most important means of investigating the properti...

Nickel-chromium
A combination of the characteristics of nickel and the charac...

Tool Or Crucible Steel
Crucible steel can be annealed either in muffled furnace or b...

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

The Leeds And Northrup Potentiometer System
The potentiometer pyrometer system is both flexible and subst...

Quality And Structure
The quality of high-speed steel is dependent to a very great ...

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

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

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

Heat-treating Equipment And Methods For Mass Production
The heat-treating department of the Brown-Lipe-Chapin Company...

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

Effect Of A Small Amount Of Copper In Medium-carbon Steel
This shows the result of tests by C. R. Hayward and A. B. Joh...

Drop Forging Dies
The kind of steel used in the die of course influences the he...



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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