VIEW THE MOBILE VERSION of Informational Site Network Informational
   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

Bessemer Process
The bessemer process consists of charging molten pig iron int...

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

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

Making Steel Balls
Steel balls are made from rods or coils according to size, st...

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

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

Heating Of Manganese Steel
Another form of heat-treating furnace is that which is used ...

Preventing Decarbonization Of Tool Steel
It is especially important to prevent decarbonization in such...

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

Molybdenum steels have been made commercially for twenty-five...

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

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

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

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

Tempering Round Dies
A number of circular dies of carbon tool steel for use in too...

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

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

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

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

Application To The Automotive Industry
The information given on the various parts of the Liberty eng...

Heat Treatment Of Gear Blanks


This section is based on a paper read before the American Gear
Manufacturers' Association at White Sulphur Springs, W. Va., Apr.
18, 1918.

Great advancement has been made in the heat treating and hardening of
gears. In this advancement the chemical and metallurgical laboratory
have played no small part. During this time, however, the condition
of the blanks as they come to the machine shop to be machined has
not received its share of attention.

There are two distinct types of gears, both types having their
champions, namely, carburized and heat-treated. The difference
between the two in the matter of steel composition is entirely in
the carbon content, the carbon never running higher than 25-point
in the carburizing type, while in the heat-treated gears the carbon
is seldom lower than 35-point. The difference in the final gear
is the hardness. The carburized gear is file hard on the surface,
with a soft, tough and ductile core to withstand shock, while the
heat-treated gear has a surface that can be touched by a file with
a core of the same hardness as the outer surface.

Next: Annealing Work

Previous: Judging The Heat Of Steel

Add to Add to Reddit Add to Digg Add to Add to Google Add to Twitter Add to Stumble Upon
Add to Informational Site Network

Viewed 3140