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Care In Annealing
Not only will benefits in machining be found by careful anne...

Steel For Chisels And Punches
The highest grades of carbon or tempering steels are to be re...

Compensating Leads
By the use of compensating leads, formed of the same materia...

The Forging Of Steel
So much depends upon the forging of steel that this operation...

Carbon In Tool Steel
Carbon tool steel, or tool steel as it is commonly called, us...

Application To The Automotive Industry
The information given on the various parts of the Liberty eng...

Temperature Recording And Regulation
Each furnace is equipped with pyrometers, but the reading an...

Pyrometers For Molten Metal
Pyrometers for molten metal are connected to portable thermoc...

The Care Of Carburizing Compounds
Of all the opportunities for practicing economy in the heat-t...

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

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

Phosphorus
PHOSPHORUS is an element (symbol P) which enters the metal fr...

The Thermo-couple
With the application of the thermo-couple, the measurement of...

Hardening Carbon Steel For Tools
For years the toolmaker had full sway in regard to make of st...

Carbon Tool Steel
Heat to a bright red, about 1,500 to 1,550 deg.F. Do not ham...

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

The Electric Process
The fourth method of manufacturing steel is by the electric f...

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

Annealing Of High-speed Steel
For annealing high-speed steel, some makers recommend using g...

The Packing Department
In Fig. 56 is shown the packing pots where the work is packe...



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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