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Steel Making

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

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

Pyrometers For Molten Metal
Pyrometers for molten metal are connected to portable thermoc...

Pickling The Forgings
The forgings were then pickled in a hot solution of either ni...

Impact Tests
Impact tests are of considerable importance as an indication ...

Restoring Overheated Steel
The effect of heat treatment on overheated steel is shown gra...

Silicon
Silicon prevents, to a large extent, defects such as gas bubb...

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

Forging High-speed Steel
Heat very slowly and carefully to from 1,800 to 2,000 deg.F....

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

For Milling Cutters And Formed Tools
FORGING.--Forge as before.--ANNEALING.--Place the steel in a ...

A Satisfactory Luting Mixture
A mixture of fireclay and sand will be found very satisfactor...

Steel Before The 1850's
In spite of a rapid increase in the use of machines and the ...

Chromium
Chromium when alloyed with steel, has the characteristic func...

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

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

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

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

Heat Treatment Of Milling Cutters Drills Reamers Etc
THE FIRE.--Gas and electric furnaces designed for high heats ...

Furnace Data
In order to give definite information concerning furnaces, fu...



Quenching The Work






Category: CASE-HARDENING OR SURFACE-CARBURIZING

In some operations case-hardened work is quenched from the box by
dumping the whole contents into the quenching tank. It is common
practice to leave a sieve or wire basket to catch the work, allowing
the carburizing material to fall to the bottom of the tank where it
can be recovered later and used again as a part of a new mixture.
For best results, however, the steel is allowed to cool down slowly
in the box after which it is removed and hardened by heating and
quenching the same as carbon steel of the same grade. It has absorbed
sufficient carbon so that, in the outer portions at least, it is
a high-carbon steel.





Next: The Quenching Tank

Previous: Effect Of Different Carburizing Material



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