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Steel Making

Tool Or Crucible Steel
Crucible steel can be annealed either in muffled furnace or b...

Molybdenum steels have been made commercially for twenty-five...

Refining The Grain
This is remedied by reheating the piece to a temperature slig...

Properties Of Steel
Steels are known by certain tests. Early tests were more or l...

Knowing What Takes Place
How are we to know if we have given a piece of steel the ver...

Quality And Structure
The quality of high-speed steel is dependent to a very great ...

Protective Screens For Furnaces
Workmen needlessly exposed to the flames, heat and glare from...

High Speed Steel
For centuries the secret art of making tool steel was handed ...

Tempering Colors On Carbon Steels
Opinions differ as to the temperature which is indicated by t...

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

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

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

The Effect Of Tempering On Water-quenched Gages
The following information has been supplied by Automatic and ...

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

Standard Analysis
The selection of a standard analysis by the manufacturer is t...

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

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

Hardness Testing
The word hardness is used to express various properties of me...

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

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

Tempering Round Dies


A number of circular dies of carbon tool steel for use in tool
holders of turret lathes were required. No proper tempering oven
was available, so the following method was adopted and proved quite

After the dies had been hardened dead hard in water, they were
cleaned up bright. A pair of ordinary smiths' tongs was made with
jaws of heavy material and to fit nicely all around the outside of
the die, leaving a 3/32-in. space when the jaws were closed around
the die. The dies being all ready, the tongs were heated red hot, and
the dies were picked up and held by the tongs. This tempered them
from the outside in, left the teeth the temper required and the
outside slightly softer. The dies held up the work successfully
and were better than when tempered in the same bath.

Next: The Effect Of Tempering On Water-quenched Gages

Previous: Shrinking And Enlarging Work

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