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Steel Making

Sulphur
SULPHUR is another element (symbol S) which is always found i...

Plant For Forging Rifle Barrels
The forging of rifle barrels in large quantities and heat-tre...

Steel Can Be Worked Cold
As noted above, steel can be worked cold, as in the case of ...

The Pyrometer And Its Use
In the heat treatment of steel, it has become absolutely nece...

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

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

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

High Speed Steel
For centuries the secret art of making tool steel was handed ...

Heat-treating Department
The heat-treating department occupies an L-shaped building. ...

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

Vanadium
Vanadium has a very marked effect upon alloy steels rich in c...

Temperature For Annealing
Theoretically, annealing should be accomplished at a tempera...

William Kelly's Air-boiling Process
An account of Bessemer's address to the British Association w...

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

Brown Automatic Signaling Pyrometer
In large heat-treating plants it has been customary to mainta...

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

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

Heavy Forging Practice
In heavy forging practice where the metal is being worked at...

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

High-carbon Machinery Steel
The carbon content of this steel is above 30 points and is ha...



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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