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Steel Making

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

Classifications Of Steel
Among makers and sellers, carbon tool-steels are classed by g...

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

Rate Of Absorption
According to Guillet, the absorption of carbon is favored by ...

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

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

Blending The Compound
Essentially, this consists of the sturdy, power-driven separa...

For Milling Cutters And Formed Tools
FORGING.--Forge as before.--ANNEALING.--Place the steel in a ...

Carbon Tool Steel
Heat to a bright red, about 1,500 to 1,550 deg.F. Do not ham...

Pyrometers
Armor plate makers sometimes use the copper ball or Siemens' ...

Hardening High-speed Steel
In forging use coke for fuel in the forge. Heat steel slowly ...

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

Case-hardening Treatments For Various Steels
Plain water, salt water and linseed oil are the three most co...

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

Annealing Of High-speed Steel
For annealing high-speed steel, some makers recommend using g...

Impact Tests
Impact tests are of considerable importance as an indication ...

Manganese
MANGANESE is a metal much like iron. Its chemical symbol is M...

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

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

Fatigue Tests
It has been known for fifty years that a beam or rod would fa...



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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