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

Annealing Of High-speed Steel
For annealing high-speed steel, some makers recommend using g...

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

Introduction Of Carbon
The matter to which these notes are primarily directed is the...

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

The Electric Process
The fourth method of manufacturing steel is by the electric f...

Cutting-off Steel From Bar
To cut a piece from an annealed bar, cut off with a hack saw,...

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

Corrosion
This steel like any other steel when distorted by cold worki...

The Thermo-couple
With the application of the thermo-couple, the measurement of...

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

Tool Or Crucible Steel
Crucible steel can be annealed either in muffled furnace or b...

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

Brown Automatic Signaling Pyrometer
In large heat-treating plants it has been customary to mainta...

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

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

Heat-treating Equipment And Methods For Mass Production
The heat-treating department of the Brown-Lipe-Chapin Company...

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

Detrimental Elements
Sulphur and phosphorus are two elements known to be detrimen...

Heat Treatment Of Milling Cutters Drills Reamers Etc
THE FIRE.--Gas and electric furnaces designed for high heats ...



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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Previous: Liberty Motor Connecting Rods



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