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The Leeds And Northrup Potentiometer System
The potentiometer pyrometer system is both flexible and subst...

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

Highly Stressed Parts
The highly stressed parts on the Liberty engine consisted of ...

Steel For Chisels And Punches
The highest grades of carbon or tempering steels are to be re...

Crankshaft
The crankshaft was the most highly stressed part of the entir...

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

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

Hardness Testing
The word hardness is used to express various properties of me...

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

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

Carburizing Low-carbon Sleeves
Low-carbon sleeves are carburized and pushed on malleable-ir...

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

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

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

Application Of Liberty Engine Materials To The Automotive Industry
The success of the Liberty engine program was an engineer...

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

Annealing In Bone
Steel and cast iron may both be annealed in granulated bone. ...

Connecting Rods
The material used for all connecting rods on the Liberty engi...

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

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



Pickling The Forgings






Category: APPLICATION OF LIBERTY ENGINE MATERIALS TO THE AUTOMOTIVE INDUSTRY

The forgings were then pickled in a hot solution of either niter
cake or sulphuric acid and water at a temperature of 170 deg.F., and
using a solution of about 25 per cent. The solution was maintained
at a constant point by taking hydrometer readings two or three
times a day, maintaining a reading of about 1.175. Sixty forked or
one hundred single rods were placed in wooden racks and immersed
in a lead-lined vat 30 by 30 by 5 ft. long. The rack was lowered
or lifted by means of an air hoist and the rods were allowed to
stay in solution from 1/2 to 1 hr., depending on the amount of
scale. The rods were then swung and lowered in the rack into running
hot water until all trace of the acid was removed.

The rod was finally subjected to Brinell test. This shows whether
or not the rod has been heat-treated to the proper hardness. If
the rods did not read between 241 and 277, they were re-treated
until the proper hardness is obtained.





Next: Application Of Liberty Engine Materials To The Automotive Industry

Previous: Liberty Motor Connecting Rods



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