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

Hints For Tool Steel Users
Do not hesitate to ask for information from the maker as to t...

Liberty Motor Connecting Rods
The requirements for materials for the Liberty motor connecti...

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

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

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

Heat Treatment Of Axles
Parts of this general type should be heat-treated to show the...

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

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

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

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

Case-hardening Treatments For Various Steels
Plain water, salt water and linseed oil are the three most co...

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

Lathe And Planer Tools
TO FORGE.--Gently warm the steel to remove any chill is parti...

Manganese
MANGANESE is a metal much like iron. Its chemical symbol is M...

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

Knowing What Takes Place
How are we to know if we have given a piece of steel the ver...

Surface Carburizing
Carburizing, commonly called case-hardening, is the art of pr...

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

The Packing Department
In Fig. 56 is shown the packing pots where the work is packe...



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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