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Steel Making

Phosphorus
PHOSPHORUS is an element (symbol P) which enters the metal fr...

Annealing Alloy Steel
The term alloy steel, from the steel maker's point of view, r...

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

Heat Treatment Of Gear Blanks
This section is based on a paper read before the American Gea...

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

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

Brown Automatic Signaling Pyrometer
In large heat-treating plants it has been customary to mainta...

Hardening Carbon Steel For Tools
For years the toolmaker had full sway in regard to make of st...

Robert Mushet
Robert (Forester) Mushet (1811-1891), born in the Forest of D...

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

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

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

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

Pyrometry And Pyrometers
A knowledge of the fundamental principles of pyrometry, or th...

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

Hardness Testing
The word hardness is used to express various properties of me...

Correction For Cold-junction Errors
The voltage generated by a thermo-couple of an electric pyrom...

Sulphur
Sulphur is another impurity and high sulphur is even a greate...

An Automatic Temperature Control Pyrometer
Automatic temperature control instruments are similar to the ...

Annealing In Bone
Steel and cast iron may both be annealed in granulated bone. ...



Tool Or Crucible Steel






Category: ANNEALING

Crucible steel can be annealed either in muffled furnace or by
being packed. Packing is by far the most satisfactory method as it
prevents scaling, local hard spots, uneven annealing, or violent
changes in shape. It should be brought up slowly to just above
its calescent or hardening temperature. The operator must know
before setting his heats the temperature at which the different
carbon content steels are hardened. The higher the carbon contents
the lower is the hardening heat, but this should in no case be
less than 1,450 deg.F.





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