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Carburizing Material
The simplest carburizing substance is charcoal. It is also th...

Short Method Of Treatment
In the new method, the packed pots are run into the case-har...

Annealing Of Rifle Components At Springfield Armory
In general, all forgings of the components of the arms manufa...

Preventing Decarbonization Of Tool Steel
It is especially important to prevent decarbonization in such...

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

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....

Tempering Round Dies
A number of circular dies of carbon tool steel for use in too...

Heat Treatment Of Steel
Heat treatment consists in heating and cooling metal at defin...

Annealing Alloy Steel
The term alloy steel, from the steel maker's point of view, r...

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

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

Composition And Properties Of Steel
It is a remarkable fact that one can look through a dozen tex...

Making Steel Balls
Steel balls are made from rods or coils according to size, st...

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

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

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

The Theory Of Tempering
Steel that has been hardened is generally harder and more br...

Brown Automatic Signaling Pyrometer
In large heat-treating plants it has been customary to mainta...

Heating
Although it is possible to work steels cold, to an extent de...



Tempering Round Dies






Category: HARDENING CARBON STEEL FOR TOOLS

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
successful.

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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