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Using Illuminating Gas
The choice of a carburizing furnace depends greatly on the fa...

Suggestions For Handling High-speed Steels
The following suggestions for handling high-speed steels are ...

Annealing
There is no mystery or secret about the proper annealing of d...

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

Compensating Leads
By the use of compensating leads, formed of the same materia...

The Care Of Carburizing Compounds
Of all the opportunities for practicing economy in the heat-t...

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

Bessemer Process
The bessemer process consists of charging molten pig iron int...

Brown Automatic Signaling Pyrometer
In large heat-treating plants it has been customary to mainta...

Sulphur
Sulphur is another impurity and high sulphur is even a greate...

Protective Screens For Furnaces
Workmen needlessly exposed to the flames, heat and glare from...

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

Affinity Of Nickel Steel For Carbon
The carbon- and nickel-steel gears are carburized separately...

Carbon-steel Forgings
Low-stressed, carbon-steel forgings include such parts as car...

Phosphorus
PHOSPHORUS is an element (symbol P) which enters the metal fr...

Critical Points
One of the most important means of investigating the properti...

Typical Oil-fired Furnaces
Several types of standard oil-fired furnaces are shown herew...

Preparing Parts For Local Case-hardening
At the works of the Dayton Engineering Laboratories Company, ...

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

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



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.





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Previous: Flange Shields For Furnaces



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