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

Preventing Cracks In Hardening
The blacksmith in the small shop, where equipment is usually ...

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

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

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

Gears
The material used for all gears on the Liberty engine was sel...

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

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

Shrinking And Enlarging Work
Steel can be shrunk or enlarged by proper heating and cooling...

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

Tool Or Crucible Steel
Crucible steel can be annealed either in muffled furnace or b...

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

Pyrometry And Pyrometers
A knowledge of the fundamental principles of pyrometry, or th...

The Influence Of Size
The size of the piece influences the physical properties obta...

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

An Automatic Temperature Control Pyrometer
Automatic temperature control instruments are similar to the ...

Carburizing Material
The simplest carburizing substance is charcoal. It is also th...

Affinity Of Nickel Steel For Carbon
The carbon- and nickel-steel gears are carburized separately...

The Effect Of Tempering On Water-quenched Gages
The following information has been supplied by Automatic and ...

Connecting Rods
The material used for all connecting rods on the Liberty engi...



Tool Or Crucible Steel






Category: ANNEALING

Crucible steel can be annealed either in muffled furnace or by
being packed. Packing is by far the most satisfactory method as it
prevents scaling, local hard spots, uneven annealing, or violent
changes in shape. It should be brought up slowly to just above
its calescent or hardening temperature. The operator must know
before setting his heats the temperature at which the different
carbon content steels are hardened. The higher the carbon contents
the lower is the hardening heat, but this should in no case be
less than 1,450 deg.F.





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Previous: Annealing Of High-speed Steel



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