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

Heat-treating Equipment And Methods For Mass Production
The heat-treating department of the Brown-Lipe-Chapin Company...

Temperatures To Use
As soon as the temperature of the steel reaches 100 deg.C. (...

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

Steel Worked In Austenitic State
As a general rule steel should be worked when it is in the a...

Double Annealing
Water annealing consists in heating the piece, allowing it to...

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

Heat Treatment Of Punches And Dies Shears Taps Etc
HEATING.--The degree to which tools of the above classes shou...

Pyrometers
Armor plate makers sometimes use the copper ball or Siemens' ...

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

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

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

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

The Leeds And Northrup Potentiometer System
The potentiometer pyrometer system is both flexible and subst...

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

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

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

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

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

Preventing Carburizing By Copper-plating
Copper-plating has been found effective and must have a thick...



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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