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Take Time For Hardening
Uneven heating and poor quenching has caused loss of many ve...

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

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

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

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

Tempering Colors On Carbon Steels
Opinions differ as to the temperature which is indicated by t...

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

Uses Of The Various Tempers Of Carbon Tool Steel
DIE TEMPER.--No. 3: All kinds of dies for deep stamping, pres...

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

Manganese
MANGANESE is a metal much like iron. Its chemical symbol is M...

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

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

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

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

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

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

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

Lathe And Planer Tools
TO FORGE.--Gently warm the steel to remove any chill is parti...

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

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



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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