With hypnosis on the march, there is practically no limit to its uses in the field of medicine, and new applications are being discovered every day. It should not be necessary to add, however, that some of these uses should remain as they ... Read more of Practical Applications Of Self-hypnosis at Auto Suggestion.caInformational Site Network Informational
Privacy
   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

Quenching The Work
In some operations case-hardened work is quenched from the bo...

Steel Before The 1850's
In spite of a rapid increase in the use of machines and the ...

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

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

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

Phosphorus
Phosphorus is one of the impurities in steel, and it has been...

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

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

Carbon Tool Steel
Heat to a bright red, about 1,500 to 1,550 deg.F. Do not ham...

The Influence Of Size
The size of the piece influences the physical properties obta...

Furnace Data
In order to give definite information concerning furnaces, fu...

The Forging Of Steel
So much depends upon the forging of steel that this operation...

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

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

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

The Care Of Carburizing Compounds
Of all the opportunities for practicing economy in the heat-t...

Air-hardening Steels
These steels are recommended for boring, turning and planing...

Nickel
Nickel may be considered as the toughest among the non-rare a...

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

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



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 3698