Do you remember when first we met? I was turning twenty--well! I don't forget How I walked along, Humming a song Across the fields and down the lane By the country road, and back again To the dear old f... Read more of "A FREE PUFF." at Give Up.caInformational Site Network Informational
Privacy
   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

Mushet And Bessemer
That Mushet was "used" by Ebbw Vale against Bessemer is, perh...

Carbon-steel Forgings
Low-stressed, carbon-steel forgings include such parts as car...

Effect Of Different Carburizing Material
[Illustrations: FIGS. 33 to 37.] Each of these different p...

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

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

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

Vanadium
Vanadium has a very marked effect upon alloy steels rich in c...

Phosphorus
Phosphorus is one of the impurities in steel, and it has been...

High Speed Steel
For centuries the secret art of making tool steel was handed ...

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

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

The Effect Of Tempering On Water-quenched Gages
The following information has been supplied by Automatic and ...

Heat Treatment Of Punches And Dies Shears Taps Etc
HEATING.--The degree to which tools of the above classes shou...

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

Silicon
SILICON is a very widespread element (symbol Si), being an es...

A Chromium-cobalt Steel
The Latrobe Steel Company make a high-speed steel without tun...

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

Sulphur
Sulphur is another impurity and high sulphur is even a greate...

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

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



Application To The Automotive Industry






Category: APPLICATION OF LIBERTY ENGINE MATERIALS TO THE AUTOMOTIVE INDUSTRY

The information given on the various parts of the Liberty engine
applies with equal force to the corresponding parts in the construction
of an automobile, truck or tractor. We recommend as first choice for
carbon-steel screw-machine parts material produced by the basic
open hearth process and having the following chemical composition;
Carbon, 0.150 to 0.250 per cent; manganese, 0.500 to 0.800 per
cent; phosphorus, 0.045 maximum per cent; sulphur, 0.075 to 0.150
per cent.

This material is very uniform and is nearly as free cutting as
bessemer screw stock. It is sufficiently uniform to be used for
unimportant carburized parts, as well as for non-heat-treated
screw-machine parts. A number of the large automobile manufacturers
are now specifying this material in preference to the regular bessemer
grades.

As second choice for carbon-steel screw-machine parts we recommend
ordinary bessemer screw stock, purchased in accordance with S. A.
E. specification No. 1114. The advantage of using No. 1114 steel
lies in the fact that the majority of warehouses carry standard
sizes of this material in stock at all times. The disadvantage
of using this material is due to its lack of uniformity.

The important criterion for transmission gears is resistance to
wear. To secure proper resistance to wear a Brinell hardness of
from 512 to 560 must be obtained. The material selected to obtain
this hardness should be one which can be made most nearly uniform,
will undergo forging operations the easiest, will be the hardest
to overheat or burn, will machine best and will respond to a good
commercial range of heat treatment.

It is a well-known fact that the element chromium, when in the form
of chromium carbide in alloy steel, offers the greatest resistance to
wear of any combination yet developed. It is also a well-known fact that
the element nickel in steel gives excellent shock-resisting properties
as well as resistance to wear but not nearly as great a resistance
to wear as chromium. It has been standard practice for a number of
years for many manufacturers to use a high nickel-chromium steel
for transmission gears. A typical nickel-chromium gear specification
is as follows: Carbon, 0.470 to 0.520 per cent; manganese, 0.500
to 0.800 per cent; phosphorus, 0.040 maximum per cent; sulphur,
0.045 maximum per cent; chromium, 0.700 to 0.950 per cent.

There is no question but that a gear made from material of such an
analysis will give excellent service. However, it is possible to
obtain the same quality of service and at the same time appreciably
reduce the cost of the finished part. The gear steel specified is
of the air-hardening type. It is extremely sensitive to secondary
pipe, as well as seams, and is extremely difficult to forge and
very easy to overheat. The heat-treatment range is very wide, but
the danger from quenching cracks is very great. In regard to the
machineability, this material is the hardest to machine of any
alloy steel known.





Next: Composition Of Transmission-gear Steel

Previous: Piston Pin



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 4525