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Steel Making

Liberty Motor Connecting Rods
The requirements for materials for the Liberty motor connecti...

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

The Quenching Tank
The quenching tank is an important feature of apparatus in c...

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

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

Shrinking And Enlarging Work
Steel can be shrunk or enlarged by proper heating and cooling...

Composition Of Transmission-gear Steel
If the nickel content of this steel is eliminated, and the pe...

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

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

Protectors For Thermo-couples
Thermo-couples must be protected from the danger of mechanica...

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

Nickel-chromium
A combination of the characteristics of nickel and the charac...

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

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

Carbon Tool Steel
Heat to a bright red, about 1,500 to 1,550 deg.F. Do not ham...

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

Impact Tests
Impact tests are of considerable importance as an indication ...

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

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

The Packing Department
In Fig. 56 is shown the packing pots where the work is packe...



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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