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Testing And Inspection Of Heat Treatment
The hard parts of the gear must be so hard that a new mill f...

Gas Consumption For Carburizing
Although the advantages offered by the gas-fired furnace for ...

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

Application Of Liberty Engine Materials To The Automotive Industry
The success of the Liberty engine program was an engineer...

Protective Screens For Furnaces
Workmen needlessly exposed to the flames, heat and glare from...

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

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

Pickling The Forgings
The forgings were then pickled in a hot solution of either ni...

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

Silicon
Silicon prevents, to a large extent, defects such as gas bubb...

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

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

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

Conclusions
Martien was probably never a serious contender for the honor ...

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

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

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

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

Pyrometers For Molten Metal
Pyrometers for molten metal are connected to portable thermoc...

Annealing Of Rifle Components At Springfield Armory
In general, all forgings of the components of the arms manufa...



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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