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Steel Making

Tensile Properties
Strength of a metal is usually expressed in the number of pou...

Preventing Decarbonization Of Tool Steel
It is especially important to prevent decarbonization in such...

Composition And Properties Of Steel
It is a remarkable fact that one can look through a dozen tex...

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 ...

Cyanide Bath For Tool Steels
All high-carbon tool steels are heated in a cyanide bath. Wi...

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

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

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

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

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

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

Typical Oil-fired Furnaces
Several types of standard oil-fired furnaces are shown herew...

Corrosion
This steel like any other steel when distorted by cold worki...

Restoring Overheated Steel
The effect of heat treatment on overheated steel is shown gra...

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

Annealing Alloy Steel
The term alloy steel, from the steel maker's point of view, r...

Preparing Parts For Local Case-hardening
At the works of the Dayton Engineering Laboratories Company, ...

Judging The Heat Of Steel
While the use of a pyrometer is of course the only way to hav...

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



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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