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

Using Illuminating Gas
The choice of a carburizing furnace depends greatly on the fa...

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

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

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

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

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

Oil-hardening Steel
Heat slowly and uniformly to 1,450 deg.F. and forge thorough...

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

Case-hardening Treatments For Various Steels
Plain water, salt water and linseed oil are the three most co...

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

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

Annealing Method
Forgings which are too hard to machine are put in pots with ...

Nickel-chromium
A combination of the characteristics of nickel and the charac...

Testing And Inspection Of Heat Treatment
The hard parts of the gear must be so hard that a new mill f...

Phosphorus
Phosphorus is one of the impurities in steel, and it has been...

Highly Stressed Parts
The highly stressed parts on the Liberty engine consisted of ...

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

Correction By Zero Adjustment
Many pyrometers are supplied with a zero adjuster, by means ...

Silicon
SILICON is a very widespread element (symbol Si), being an es...



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.





Next: Annealing Alloy Steel

Previous: Annealing Of High-speed Steel



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