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Steel Making

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

Hardness Testing
The word hardness is used to express various properties of me...

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

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

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

Effect Of Different Carburizing Material
[Illustrations: FIGS. 33 to 37.] Each of these different p...

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

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

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

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

Heat Treatment Of Steel
Heat treatment consists in heating and cooling metal at defin...

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

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

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

Quenching
It is considered good practice to quench alloy steels from th...

Nickel
Nickel may be considered as the toughest among the non-rare a...

Care In Annealing
Not only will benefits in machining be found by careful anne...

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

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

Corrosion
This steel like any other steel when distorted by cold worki...



A Satisfactory Luting Mixture






Category: CASE-HARDENING OR SURFACE-CARBURIZING

A mixture of fireclay and sand will be found very satisfactory
for closing up the boxes, and by observing the appearance of the
work when taken out we can gage the suitability of the methods
employed, for unless the boxes are carefully sealed the work is
generally covered with dark scales, while if properly done the
articles will be of a light gray.

By observing the above recommendations reliable results can be obtained,
and we can expect uniform results after quenching.





Next: Gas Consumption For Carburizing

Previous: Using Illuminating Gas



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