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

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

Case-hardening Treatments For Various Steels
Plain water, salt water and linseed oil are the three most co...

Hardening High-speed Steels
We will now take up the matter of hardening high-speed steels...

It is considered good practice to quench alloy steels from th...

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

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

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

Properties Of Alloy Steels
The following table shows the percentages of carbon, manganes...

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

Tungsten, as an alloy in steel, has been known and used for a...

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

Hardening Operation
Hardening a gear is accomplished as follows: The gear is tak...

The Penetration Of Carbon
Carburized mild steel is used to a great extent in the manufa...

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

Process Of Carburizing
Carburizing imparts a shell of high-carbon content to a low-...

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

Piston Pin
The piston pin on an aviation engine must possess maximum res...

Carbon Steels For Different Tools
All users of tool steels should carefully study the different...

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

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

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