Listens - Find articles, humour and insight from a deaf prespective. Visit ListensInformational Site Network Informational
Privacy
   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

Phosphorus
Phosphorus is one of the impurities in steel, and it has been...

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

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

Temperatures To Use
As soon as the temperature of the steel reaches 100 deg.C. (...

Tensile Properties
Strength of a metal is usually expressed in the number of pou...

The Leeds And Northrup Potentiometer System
The potentiometer pyrometer system is both flexible and subst...

Chromium
Chromium when alloyed with steel, has the characteristic func...

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

Complete Calibration Of Pyrometers
For the complete calibration of a thermo-couple of unknown e...

Manganese
Manganese adds considerably to the tensile strength of steel,...

Standard Analysis
The selection of a standard analysis by the manufacturer is t...

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

Tempering Colors On Carbon Steels
Opinions differ as to the temperature which is indicated by t...

Hardening Carbon Steel For Tools
For years the toolmaker had full sway in regard to make of st...

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

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

Annealing Of Rifle Components At Springfield Armory
In general, all forgings of the components of the arms manufa...

The Penetration Of Carbon
Carburized mild steel is used to a great extent in the manufa...

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

Correction By Zero Adjustment
Many pyrometers are supplied with a zero adjuster, by means ...



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



Add to del.icio.us Add to Reddit Add to Digg Add to Del.icio.us Add to Google Add to Twitter Add to Stumble Upon
Add to Informational Site Network
Report
Privacy
SHAREADD TO EBOOK


Viewed 2886