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William Kelly's Air-boiling Process
An account of Bessemer's address to the British Association w...

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

Tungsten
Tungsten, as an alloy in steel, has been known and used for a...

Crucible Steel
Crucible steel is still made by melting material in a clay or...

Hardening Carbon Steel For Tools
For years the toolmaker had full sway in regard to make of st...

A Satisfactory Luting Mixture
A mixture of fireclay and sand will be found very satisfactor...

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

Quenching
It is considered good practice to quench alloy steels from th...

Properties Of Steel
Steels are known by certain tests. Early tests were more or l...

Rate Of Cooling
At the option of the manufacturer, the above treatment of gea...

The Effect
The heating at 1,600 deg.F. gives the first heat treatment w...

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

Composition Of Transmission-gear Steel
If the nickel content of this steel is eliminated, and the pe...

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

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

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

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

An Automatic Temperature Control Pyrometer
Automatic temperature control instruments are similar to the ...

Care In Annealing
Not only will benefits in machining be found by careful anne...

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



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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