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Annealing Work
With the exception of several of the higher types of alloy s...

Vanadium
Vanadium has a very marked effect upon alloy steels rich in c...

Detrimental Elements
Sulphur and phosphorus are two elements known to be detrimen...

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

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

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

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

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 too...

Furnace Data
In order to give definite information concerning furnaces, fu...

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

Judging The Heat Of Steel
While the use of a pyrometer is of course the only way to hav...

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

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

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

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

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

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

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

High-chromium Or Rust-proof Steel
High-chromium, or what is called stainless steel containing f...



Heating Of Manganese Steel






Category: FURNACES

Another form of heat-treating furnace
is that which is used for the heating of manganese and other alloy
steels, which after having been brought to the proper heat are drawn
from the furnace into an immediate quenching tank. With manganese
steel in particular, the parts are so fragile and easily damaged
while hot that it is frequent practice to have a sloping platform
immediately in front of the furnace door down which the castings
may slide into a tank below the floor level. Such a furnace with
a quenching tank in front of its door is shown in Fig. 108.

These tanks are covered with plates while charging the furnace
and the cold castings are placed in a moderately cool furnace.
Since some of these steels must not be charged into a furnace where
the heat is extreme but should be brought up to their final heat
gradually, there is little discomfort during the charging process.
When quenching, however, from a temperature of 1,800 deg. to 1,900 deg.,
it is extremely unpleasant in front of the doors. The swinging
shield is here adapted to give protection for this work. As will
be noted it is hung a sufficient distance in front of the doors,
that it may not interfere with the castings as they come from the
furnace, and slide down into the tank.

To facilitate the work, and avoid the necessity of working with
the bars outside the edges of the shield, the slot-like hole is
cut in the center of the shield, and through this the bars or rakes
for dragging out the castings are easily inserted and manipulated.
The advantage of such a swinging shield is that it may be readily
moved from side to side, or forward and back as occasion requires.





Next: Furnace Data

Previous: Flange Shields For Furnaces



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