—Sunday —Rest A Talk on Sunday Observance and Its Relation to the Christian Life. THE LESSON—That the things we think and do on the Lord's day are a true index of our character. The importance of the matter of Su... Read more of Warmth And Coldness at How to Draw.caInformational Site Network Informational
Privacy
   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

Quality And Structure
The quality of high-speed steel is dependent to a very great ...

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

S A E Heat Treatments
The Society of Automotive Engineers have adopted certain heat...

Leeds And Northrup Optical Pyrometer
The principles of this very popular method of measuring tempe...

Chrome-nickel Steel
Forging heat of chrome-nickel steel depends very largely on ...

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

Calibration Of Pyrometer With Common Salt
An easy and convenient method for standardization and one whi...

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

Manganese
Manganese adds considerably to the tensile strength of steel,...

Effect Of A Small Amount Of Copper In Medium-carbon Steel
This shows the result of tests by C. R. Hayward and A. B. Joh...

Heat Treatment Of Milling Cutters Drills Reamers Etc
THE FIRE.--Gas and electric furnaces designed for high heats ...

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

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

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

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

High-carbon Machinery Steel
The carbon content of this steel is above 30 points and is ha...

The Influence Of Size
The size of the piece influences the physical properties obta...

Take Time For Hardening
Uneven heating and poor quenching has caused loss of many ve...

Hardening
Steel is hardened by quenching from above the upper critical....

The Care Of Carburizing Compounds
Of all the opportunities for practicing economy in the heat-t...



Heat Treatment Of Axles






Category: APPLICATION OF LIBERTY ENGINE MATERIALS TO THE AUTOMOTIVE INDUSTRY

Parts of this general type should be heat-treated to show the following
minimum physical properties: Elastic limit, 115,000 lb. per square
inch; elongation in 2 in., 16 per cent; reduction of area, 50 per
cent; Brinell hardness, 277 to 321.

The heat treatment used to secure these physical properties consists
in quenching from a temperature of from 1,520 to 1,540 deg.F. in water
and tempering at a temperature of from 975 to 1,025 deg.F. Where the
axle shaft is a forging, and in the case of steering knuckles and
arms, this heat treatment should be preceded by normalizing the
forgings at a temperature of from 1,550 to 1,600 deg.F. It will be
noted that these physical properties correspond to those worked
out for an ideal aviation engine crankshaft. If parts of this type
are designed with proper sections, so that this range of physical
properties can be used, the part in question will give maximum
service.

One of the most important developments during the Liberty engine
program was the fact that it is not necessary to use a high-analysis
alloy steel to secure a finished part which will give proper service.
This fact should save the automotive industry millions of dollars
on future production.

If the proper authority be given the metallurgical engineer to
govern the handling of the steel from the time it is purchased
until it is assembled into finished product, mild-analysis steels
can be used and the quality of the finished product guaranteed.
It was only through the careful adherence to these fundamental
principles that it was possible to produce 20,000 Liberty engines,
which are considered to be the most highly stressed mechanism ever
produced, without the failure of a single engine from defective
material or heat treatment.





Next: Making Steel Balls

Previous: Composition Of Transmission-gear Steel



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 3929