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Steel Making

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

Pickling The Forgings
The forgings were then pickled in a hot solution of either ni...

Heat Treatment Of Lathe Planer And Similar Tools
FIRE.--For these tools a good fire is one made of hard foundr...

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

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

Flange Shields For Furnaces
Such portable flame shields as the one illustrated in Fig. 1...

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

Heating Of Manganese Steel
Another form of heat-treating furnace is that which is used ...

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

Forging High-speed Steel
Heat very slowly and carefully to from 1,800 to 2,000 deg.F....

Introduction Of Carbon
The matter to which these notes are primarily directed is the...

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

Placing Of Pyrometers
When installing a pyrometer, care should be taken that it re...

Connecting Rods
The material used for all connecting rods on the Liberty engi...

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

Plant For Forging Rifle Barrels
The forging of rifle barrels in large quantities and heat-tre...

Temperature For Annealing
Theoretically, annealing should be accomplished at a tempera...

Optical System And Electrical Circuit Of The Leeds & Northrup Optical Pyrometer
For extremely high temperature, the optical pyrometer is lar...

Carburizing By Gas
The process of carburizing by gas, briefly mentioned on page ...

Silicon
Silicon prevents, to a large extent, defects such as gas bubb...



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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