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Steel Making

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

Take Time For Hardening
Uneven heating and poor quenching has caused loss of many ve...

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

ANNEALING can be done by heating to temperatures ranging from...

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

The Pyrometer And Its Use
In the heat treatment of steel, it has become absolutely nece...

A Chromium-cobalt Steel
The Latrobe Steel Company make a high-speed steel without tun...

Application To The Automotive Industry
The information given on the various parts of the Liberty eng...

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

Annealing To Relieve Internal Stresses
Work quenched from a high temperature and not afterward tempe...

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

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

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

Temperatures To Use
As soon as the temperature of the steel reaches 100 deg.C. (...

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

Heavy Forging Practice
In heavy forging practice where the metal is being worked at...

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

The Modern Hardening Room
A hardening room of today means a very different place from ...

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

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

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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