VIEW THE MOBILE VERSION of www.steelmaking.ca Informational Site Network Informational
Privacy
   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

Annealing Of Rifle Components At Springfield Armory
In general, all forgings of the components of the arms manufa...

Machineability
Reheating for machine ability was done at 100 deg. less than ...

Temperature For Annealing
Theoretically, annealing should be accomplished at a tempera...

Steel Worked In Austenitic State
As a general rule steel should be worked when it is in the a...

Air-hardening Steels
These steels are recommended for boring, turning and planing...

Furnace Data
In order to give definite information concerning furnaces, fu...

Properties Of Alloy Steels
The following table shows the percentages of carbon, manganes...

The Forging Of Steel
So much depends upon the forging of steel that this operation...

Drop Forging Dies
The kind of steel used in the die of course influences the he...

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

Composition And Properties Of Steel
It is a remarkable fact that one can look through a dozen tex...

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

Heat Treatment Of Lathe Planer And Similar Tools
FIRE.--For these tools a good fire is one made of hard foundr...

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

Alloying Elements
Commercial steels of even the simplest types are therefore p...

Forging High-speed Steel
Heat very slowly and carefully to from 1,800 to 2,000 deg.F....

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

Shrinking And Enlarging Work
Steel can be shrunk or enlarged by proper heating and cooling...

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

Double Annealing
Water annealing consists in heating the piece, allowing it to...



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 2797