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Steel Making

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

Hardening High-speed Steel
In forging use coke for fuel in the forge. Heat steel slowly ...

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

The forgings can be hardened by cooling in still air or quen...

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

SILICON is a very widespread element (symbol Si), being an es...

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

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

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

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

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

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

SULPHUR is another element (symbol S) which is always found i...

Plant For Forging Rifle Barrels
The forging of rifle barrels in large quantities and heat-tre...

Fatigue Tests
It has been known for fifty years that a beam or rod would fa...

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

A combination of the characteristics of nickel and the charac...

Classifications Of Steel
Among makers and sellers, carbon tool-steels are classed by g...

Instructions For Working High-speed Steel
Owing to the wide variations in the composition of high-speed...

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

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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