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Steel Making

The Electric Process
The fourth method of manufacturing steel is by the electric f...

Placing Of Pyrometers
When installing a pyrometer, care should be taken that it re...

Pyrometry And Pyrometers
A knowledge of the fundamental principles of pyrometry, or th...

Instructions For Working High-speed Steel
Owing to the wide variations in the composition of high-speed...

Piston Pin
The piston pin on an aviation engine must possess maximum res...

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

Robert Mushet
Robert (Forester) Mushet (1811-1891), born in the Forest of D...

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

Correction For Cold-junction Errors
The voltage generated by a thermo-couple of an electric pyrom...

Uses Of The Various Tempers Of Carbon Tool Steel
DIE TEMPER.--No. 3: All kinds of dies for deep stamping, pres...

The Quenching Tank
The quenching tank is an important feature of apparatus in c...

The Packing Department
In Fig. 56 is shown the packing pots where the work is packe...

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

Annealing To Relieve Internal Stresses
Work quenched from a high temperature and not afterward tempe...

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

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

Detrimental Elements
Sulphur and phosphorus are two elements known to be detrimen...

Steel For Chisels And Punches
The highest grades of carbon or tempering steels are to be re...

Crankshaft
The crankshaft was the most highly stressed part of the entir...

Preventing Cracks In Hardening
The blacksmith in the small shop, where equipment is usually ...



The Effect






Category: HEAT TREATMENT OF STEEL

The heating at 1,600 deg.F. gives the first heat treatment
which refines the core, which under the former high heat (1,700 deg.F.)
was rendered coarsely crystalline. All the gears, including the
scrap gears, are quenched direct from the pot in this manner.

The gears then go to the reheating furnaces, situated in front of
a battery of Gleason quenching machines. These furnaces accommodate
from 12 to 16 crown gears. The carbon-steel gears are heated in a
reducing atmosphere to about 1,425 deg.F. (depending on the carbon
content) placed in the dies in the Gleason quenching machine, and
quenched between dies in mineral oil at less than 100 deg.F. The test
gear receives exactly the same treatment as the others and is then
broken, giving a record of the condition of both case and core.





Next: Affinity Of Nickel Steel For Carbon

Previous: Short Method Of Treatment



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