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

Application To The Automotive Industry
The information given on the various parts of the Liberty eng...

The Penetration Of Carbon
Carburized mild steel is used to a great extent in the manufa...

Typical Oil-fired Furnaces
Several types of standard oil-fired furnaces are shown herew...

The Effect Of Tempering On Water-quenched Gages
The following information has been supplied by Automatic and ...

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

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

Phosphorus
PHOSPHORUS is an element (symbol P) which enters the metal fr...

Annealing
ANNEALING can be done by heating to temperatures ranging from...

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

Chromium
Chromium when alloyed with steel, has the characteristic func...

Double Annealing
Water annealing consists in heating the piece, allowing it to...

High Speed Steel
For centuries the secret art of making tool steel was handed ...

Cyanide Bath For Tool Steels
All high-carbon tool steels are heated in a cyanide bath. Wi...

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

Classifications Of Steel
Among makers and sellers, carbon tool-steels are classed by g...

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

Flange Shields For Furnaces
Such portable flame shields as the one illustrated in Fig. 1...

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

Optical System And Electrical Circuit Of The Leeds & Northrup Optical Pyrometer
For extremely high temperature, the optical pyrometer is lar...



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.





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