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Effect Of Different Carburizing Material
[Illustrations: FIGS. 33 to 37.] Each of these different p...

Protectors For Thermo-couples
Thermo-couples must be protected from the danger of mechanica...

Composition Of Transmission-gear Steel
If the nickel content of this steel is eliminated, and the pe...

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

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

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

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

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

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

Ebbw Vale And The Bessemer Process
After his British Association address in August 1856, Besseme...

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

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

Placing The Thermo-couples
The following illustrations from the Taylor Instrument Compan...

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

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

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

High-chromium Or Rust-proof Steel
High-chromium, or what is called stainless steel containing f...

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

Carburizing Low-carbon Sleeves
Low-carbon sleeves are carburized and pushed on malleable-ir...

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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