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

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

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

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

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

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

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

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

Mushet And Bessemer
That Mushet was "used" by Ebbw Vale against Bessemer is, perh...

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

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

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

Instructions For Working High-speed Steel
Owing to the wide variations in the composition of high-speed...

Fatigue Tests
It has been known for fifty years that a beam or rod would fa...

Steel Before The 1850's
In spite of a rapid increase in the use of machines and the ...

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

Chrome-nickel Steel
Forging heat of chrome-nickel steel depends very largely on ...

Preventing Carburizing By Copper-plating
Copper-plating has been found effective and must have a thick...

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

Gears
The material used for all gears on the Liberty engine was sel...



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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