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

Cyanide Bath For Tool Steels
All high-carbon tool steels are heated in a cyanide bath. Wi...

The Packing Department
In Fig. 56 is shown the packing pots where the work is packe...

Calibration Of Pyrometer With Common Salt
An easy and convenient method for standardization and one whi...

The Effect
The heating at 1,600 deg.F. gives the first heat treatment w...

Pyrometers
Armor plate makers sometimes use the copper ball or Siemens' ...

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

Heat Treatment Of Gear Blanks
This section is based on a paper read before the American Gea...

Conclusions
Martien was probably never a serious contender for the honor ...

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

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

Judging The Heat Of Steel
While the use of a pyrometer is of course the only way to hav...

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

Robert Mushet
Robert (Forester) Mushet (1811-1891), born in the Forest of D...

Annealing
There is no mystery or secret about the proper annealing of d...

Hardening
Steel is hardened by quenching from above the upper critical....

Hardening Operation
Hardening a gear is accomplished as follows: The gear is tak...

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

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

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



Phosphorus






Category: COMPOSITION AND PROPERTIES OF STEEL

PHOSPHORUS is an element (symbol P) which enters the metal from
the ore. It remains in the steel when made by the so-called acid
process, but it can be easily eliminated down to 0.06 per cent
in the basic process. In fact the discovery of the basic process
was necessary before the huge iron deposits of Belgium and the
Franco-German border could be used. These ores contain several
per cent phosphorus, and made a very brittle steel (cold short)
until basic furnaces were used. Basic furnaces allow the formation
of a slag high in lime, which takes practically all the phosphorus
out of the metal. Not only is the resulting metal usable, but the
slag makes a very excellent fertilizer, and is in good demand.





Next: Silicon

Previous: Sulphur



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