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Steel Making

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

There is no mystery or secret about the proper annealing of d...

A Satisfactory Luting Mixture
A mixture of fireclay and sand will be found very satisfactor...

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

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

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

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

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

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

Oil-hardening Steel
Heat slowly and uniformly to 1,450 deg.F. and forge thorough...

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

Manganese adds considerably to the tensile strength of steel,...

Protectors For Thermo-couples
Thermo-couples must be protected from the danger of mechanica...

Preventing Cracks In Hardening
The blacksmith in the small shop, where equipment is usually ...

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

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

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

Carbon In Tool Steel
Carbon tool steel, or tool steel as it is commonly called, us...

Heat Treatment Of Punches And Dies Shears Taps Etc
HEATING.--The degree to which tools of the above classes shou...

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

Pickling The Forgings


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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