A syllable is a distinct sound produced by a single effort of [Transcriber's note: 1-2 words illegible] shall, pig, dog. In every syllable there must be at least one vowel. A word consists of one syllable or a combination of syllables. Man... Read more of SYLLABLES AND WORDS at Speaking Writing.comInformational Site Network Informational
Privacy
   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

Annealing Method
Forgings which are too hard to machine are put in pots with ...

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

A Chromium-cobalt Steel
The Latrobe Steel Company make a high-speed steel without tun...

High-carbon Machinery Steel
The carbon content of this steel is above 30 points and is ha...

Vanadium
Vanadium has a very marked effect upon alloy steels rich in c...

Restoring Overheated Steel
The effect of heat treatment on overheated steel is shown gra...

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

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

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

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

Chrome-nickel Steel
Forging heat of chrome-nickel steel depends very largely on ...

Short Method Of Treatment
In the new method, the packed pots are run into the case-har...

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

Blending The Compound
Essentially, this consists of the sturdy, power-driven separa...

Compensating Leads
By the use of compensating leads, formed of the same materia...

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

Hardening
Steel is hardened by quenching from above the upper critical....

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

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

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



Preventing Carburizing By Copper-plating






Category: CASE-HARDENING OR SURFACE-CARBURIZING

Copper-plating has been found effective and must have a thickness
of 0.0005 in. Less than this does not give a continuous coating.
The plating bath used has a temperature of 170 deg.F. A voltage of
4.1 is to be maintained across the terminals. Regions which are
to be hardened can be kept free from copper by coating them with
paraffin before they enter the plating tank. The operation is as
follows:

Operation
No. Contents of bath Purpose
1 Gasoline To remove grease
2 Sawdust To dry
3 Warm potassium hydroxide solution To remove grease and dirt
4 Warm water To wash
5 Warm sulphuric acid solution To acid clean
6 Warm water To wash
7 Cold water Additional wash
8 Cold potassium cyanide solution Cleanser
9 Cold water To wash
10 Electric cleaner, warm sodium Cleanser to give good
hydroxide case-iron anode plating surface
11 Copper plating bath of copper Plating bath
sulphate and potassium cyanide
solution warm

There are also other methods of preventing case-hardening, one
being to paint the surface with a special compound prepared for
this purpose. In some cases a coating of plastic asbestos is used
while in others thin sheet asbestos is wired around the part to
be kept soft.





Next: Preparing Parts For Local Case-hardening

Previous: Carburizing By Gas



Add to del.icio.us Add to Reddit Add to Digg Add to Del.icio.us Add to Google Add to Twitter Add to Stumble Upon
Add to Informational Site Network
Report
Privacy
SHAREADD TO EBOOK


Viewed 3595