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   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

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

Surface Carburizing
Carburizing, commonly called case-hardening, is the art of pr...

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

Drop Forging Dies
The kind of steel used in the die of course influences the he...

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

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

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

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

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

Calibration Of Pyrometer With Common Salt
An easy and convenient method for standardization and one whi...

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

Rate Of Absorption
According to Guillet, the absorption of carbon is favored by ...

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

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

Machineability
Reheating for machine ability was done at 100 deg. less than ...

Hardening
Steel is hardened by quenching from above the upper critical....

Hardening Operation
Hardening a gear is accomplished as follows: The gear is tak...

S A E Heat Treatments
The Society of Automotive Engineers have adopted certain heat...

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

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



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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