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   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

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

Open Hearth Process
The open hearth furnace consists of a big brick room with a l...

Properties Of Steel
Steels are known by certain tests. Early tests were more or l...

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

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

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

Hardening Carbon Steel For Tools
For years the toolmaker had full sway in regard to make of st...

A Chromium-cobalt Steel
The Latrobe Steel Company make a high-speed steel without tun...

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

Non-shrinking Oil-hardening Steels
Certain steels have a very low rate of expansion and contract...

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

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

Leeds And Northrup Optical Pyrometer
The principles of this very popular method of measuring tempe...

Refining The Grain
This is remedied by reheating the piece to a temperature slig...

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

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

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

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

Placing Of Pyrometers
When installing a pyrometer, care should be taken that it re...

Protective Screens For Furnaces
Workmen needlessly exposed to the flames, heat and glare from...



Annealing






Category: ALLOYS AND THEIR EFFECT UPON STEEL

ANNEALING can be done by heating to temperatures ranging from 1,290
to 1,380 deg.F. and cooling in air or quenching in water or oil. After
this treatment the forgings will have a hardness of about 200 Brinell
and a tensile strength of 100,000 to 112,000 lb. per square inch.
If softer forgings are desired they can be heated to a temperature
of from 1,560 to 1,650 deg.F. and cooled very slowly. Although softer
the forgings will not machine as smoothly as when annealed at the
lower temperature.





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Previous: High-chromium Or Rust-proof Steel



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