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

Hardening High-speed Steels
We will now take up the matter of hardening high-speed steels...

Annealing Work
With the exception of several of the higher types of alloy s...

Making Steel Balls
Steel balls are made from rods or coils according to size, st...

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

Carbon Steels For Different Tools
All users of tool steels should carefully study the different...

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

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

Hardening Operation
Hardening a gear is accomplished as follows: The gear is tak...

Open Hearth Process
The open hearth furnace consists of a big brick room with a l...

Preventing Decarbonization Of Tool Steel
It is especially important to prevent decarbonization in such...

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

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

Carburizing Material
The simplest carburizing substance is charcoal. It is also th...

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

Steel Before The 1850's
In spite of a rapid increase in the use of machines and the ...

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

Nickel-chromium
A combination of the characteristics of nickel and the charac...

Suggestions For Handling High-speed Steels
The following suggestions for handling high-speed steels are ...

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



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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