On the threshold of one of the doors of Smithills Hall there is a bloody footstep impressed into the door-step, and ruddy as if the bloody foot had just trodden there; and it is averred that, on a certain night of the year, and at a certai... Read more of The Bloody Footstep at Scary Stories.caInformational Site Network Informational
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   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

Cutting-off Steel From Bar
To cut a piece from an annealed bar, cut off with a hack saw,...

Care In Annealing
Not only will benefits in machining be found by careful anne...

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

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

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

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

Temperature Recording And Regulation
Each furnace is equipped with pyrometers, but the reading an...

Conclusions
Martien was probably never a serious contender for the honor ...

Carburizing Material
The simplest carburizing substance is charcoal. It is also th...

Annealing In Bone
Steel and cast iron may both be annealed in granulated bone. ...

Carbon In Tool Steel
Carbon tool steel, or tool steel as it is commonly called, us...

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

Air-hardening Steels
These steels are recommended for boring, turning and planing...

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

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

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

Testing And Inspection Of Heat Treatment
The hard parts of the gear must be so hard that a new mill f...

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

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

Ebbw Vale And The Bessemer Process
After his British Association address in August 1856, Besseme...



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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