VIEW THE MOBILE VERSION of www.steelmaking.ca Informational Site Network Informational
Privacy
   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

Refining The Grain
This is remedied by reheating the piece to a temperature slig...

Hints For Tool Steel Users
Do not hesitate to ask for information from the maker as to t...

Drop Forging Dies
The kind of steel used in the die of course influences the he...

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

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

Complete Calibration Of Pyrometers
For the complete calibration of a thermo-couple of unknown e...

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

Heating Of Manganese Steel
Another form of heat-treating furnace is that which is used ...

The Modern Hardening Room
A hardening room of today means a very different place from ...

Placing The Thermo-couples
The following illustrations from the Taylor Instrument Compan...

Care In Annealing
Not only will benefits in machining be found by careful anne...

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

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

S A E Heat Treatments
The Society of Automotive Engineers have adopted certain heat...

Crucible Steel
Crucible steel is still made by melting material in a clay or...

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

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

The Effect
The heating at 1,600 deg.F. gives the first heat treatment w...

Tensile Properties
Strength of a metal is usually expressed in the number of pou...

Calibration Of Pyrometer With Common Salt
An easy and convenient method for standardization and one whi...



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 4062