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Steel Making

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

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

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

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

Short Method Of Treatment
In the new method, the packed pots are run into the case-har...

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

Tool Or Crucible Steel
Crucible steel can be annealed either in muffled furnace or b...

Quenching Tool Steel
To secure proper hardness, the cooling of quenching of steel ...

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

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

Hints For Tool Steel Users
Do not hesitate to ask for information from the maker as to t...

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

Annealing Method
Forgings which are too hard to machine are put in pots with ...

Composition Of Transmission-gear Steel
If the nickel content of this steel is eliminated, and the pe...

Care In Annealing
Not only will benefits in machining be found by careful anne...

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

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

Process Of Carburizing
Carburizing imparts a shell of high-carbon content to a low-...

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

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



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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