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Steel Making

Separating The Work From The Compound
During the pulling of the heat, the pots are dumped upon a ca...

A Chromium-cobalt Steel
The Latrobe Steel Company make a high-speed steel without tun...

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

Chrome-nickel Steel
Forging heat of chrome-nickel steel depends very largely on ...

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

Heat-treating Department
The heat-treating department occupies an L-shaped building. ...

Effects Of Proper Annealing
Proper annealing of low-carbon steels causes a complete solu...

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

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

Heating
Although it is possible to work steels cold, to an extent de...

Carbon Steels For Different Tools
All users of tool steels should carefully study the different...

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

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

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

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

Open Hearth Process
The open hearth furnace consists of a big brick room with a l...

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

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

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

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



Temperature Recording And Regulation






Category: HEAT TREATMENT OF STEEL

Each furnace is equipped
with pyrometers, but the reading and recording of all temperatures
are in the hands of one man, who occupies a room with an opening
into the end of the hardening department. The opening is about 15
ft. above the floor level. On each side of it, easily legible from
all of the furnaces, is a board with the numbers of the various
furnaces, as shown in Figs. 59 and 60. Opposite each furnace number
is a series of hooks whereon are hung metal numbers representing the
pyrometer readings of the temperature in that particular furnace.
Within the room, as shown in Fig. 60, the indicating instrument
is to the right, and to the left is a switchboard to connect it
with the thermo-couples in the various furnaces. The boards shown
to the right and the left swing into the room, which enables the
attendant easily to change the numbers to conform to the pyrometer
readings. Readings of the temperatures of the carburizing furnaces
are taken and tabulated every ten minutes. These, numbered 1 to
10, are shown on the board to the right in Fig. 59. The card shown
in Fig. 61 gives such a record. These records are filed away for
possible future reference.



The temperatures of the reheating furnaces, numbered from 1 to
26 and shown on the board to the left in Fig. 59, are taken every
5 min.

Each furnace has a large metal sign on which is marked the temperature
at which the furnace regulator is required to keep his heat. As
soon as any variation from this is posted on the board outside
the pyrometer room, the attendant sees it and adjusts the burners
to compensate.




DIES FOR GLEASON TEMPERING MACHINES.--In Fig. 62 is shown a set
of dies for the Gleason tempering machine. These accurately made
dies fit and hold the gear true during quenching, thus preventing
distortion.





Next: Hardening Operation

Previous: Testing And Inspection Of Heat Treatment



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