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Steel Making

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

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

Reheating for machine ability was done at 100 deg. less than ...

Open Hearth Process
The open hearth furnace consists of a big brick room with a l...

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

Forging High-speed Steel
Heat very slowly and carefully to from 1,800 to 2,000 deg.F....

Rate Of Absorption
According to Guillet, the absorption of carbon is favored by ...

Application Of Liberty Engine Materials To The Automotive Industry
The success of the Liberty engine program was an engineer...

Steel Can Be Worked Cold
As noted above, steel can be worked cold, as in the case of ...

Quenching Tool Steel
To secure proper hardness, the cooling of quenching of steel ...

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

Heat Treatment Of Lathe Planer And Similar Tools
FIRE.--For these tools a good fire is one made of hard foundr...

Surface Carburizing
Carburizing, commonly called case-hardening, is the art of pr...

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

Robert Mushet
Robert (Forester) Mushet (1811-1891), born in the Forest of D...

The Effect
The heating at 1,600 deg.F. gives the first heat treatment w...

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

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

Crucible Steel
Crucible steel is still made by melting material in a clay or...

Connecting Rods
The material used for all connecting rods on the Liberty engi...

Pyrometers For Molten Metal


Pyrometers for molten metal are connected to portable thermocouples
as in Fig. 132. Usually the pyrometer is portable, as shown in
this case, which is a Brown. Other methods of mounting for this
kind of work arc shown in Figs. 133 and 134. The bent mountings
are designed for molten metal, such as brass or copper and are
supplied with either clay, graphite or carborundum tubes. Fifteen
feet of connecting wire is usually supplied.

The angle mountings, Fig. 134, are recommended for baths such as
lead or cyanide. The horizontal arm is usually about 14 in. long,
and the whole mounting is easily taken apart making replacements
very easy. Details of the thermo-couple shown in Fig. 132 are given
in Fig. 135. This is a straight rod with a protector for the hand
of the operator. The lag in such couples is less than one minute.
These are Englehard mountings.

Next: Protectors For Thermo-couples

Previous: An Automatic Temperature Control Pyrometer

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