VIEW THE MOBILE VERSION of www.steelmaking.ca Informational Site Network Informational
Privacy
   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

Hardening
The forgings can be hardened by cooling in still air or quen...

Double Annealing
Water annealing consists in heating the piece, allowing it to...

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

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

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

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

Heavy Forging Practice
In heavy forging practice where the metal is being worked at...

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

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

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

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

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

Cyanide Bath For Tool Steels
All high-carbon tool steels are heated in a cyanide bath. Wi...

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

Quenching The Work
In some operations case-hardened work is quenched from the bo...

Non-shrinking Oil-hardening Steels
Certain steels have a very low rate of expansion and contract...

Plant For Forging Rifle Barrels
The forging of rifle barrels in large quantities and heat-tre...

Pickling The Forgings
The forgings were then pickled in a hot solution of either ni...

Restoring Overheated Steel
The effect of heat treatment on overheated steel is shown gra...

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



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 3057