VIEW THE MOBILE VERSION of Informational Site Network Informational
   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

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

Carbon-steel Forgings
Low-stressed, carbon-steel forgings include such parts as car...

Properties Of Alloy Steels
The following table shows the percentages of carbon, manganes...

Heat Treatment Of Axles
Parts of this general type should be heat-treated to show the...

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

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

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

Reheating for machine ability was done at 100 deg. less than ...

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

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

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

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

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

Effects Of Proper Annealing
Proper annealing of low-carbon steels causes a complete solu...

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

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

Ebbw Vale And The Bessemer Process
After his British Association address in August 1856, Besseme...

The Theory Of Tempering
Steel that has been hardened is generally harder and more br...

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

Steel Can Be Worked Cold
As noted above, steel can be worked cold, as in the case of ...

Annealing Of High-speed Steel


For annealing high-speed steel, some makers recommend using ground
mica, charcoal, lime, fine dry ashes or lake sand as a packing
in the annealing boxes. Mixtures of one part charcoal, one part
lime and three parts of sand are also suggested, or two parts of
ashes may be substituted for the one part of lime.

To bring about the softest structure or machine ability of high-speed
steel, it should be packed in charcoal in boxes or pipes, carefully
sealed at all points, so that no gases will escape or air be admitted.
It should be heated slowly to not less than 1,450 deg.F. and the steel
must not be removed from its packing until it is cool. Slow heating
means that the high heat must have penetrated to the very core of
the steel.

When the steel is heated clear through it has been in the furnace
long enough. If the steel can remain in the furnace and cool down
with it, there will be no danger of air blasts or sudden or uneven
cooling. If not, remove the box and cover quickly with dry ashes,
sand or lime until it becomes cold.

Too high a heat or maintaining the heat for too long a period,
produces a harsh, coarse grain and greatly increases the liability
to crack in hardening. It also reduces the strength and toughness
of the steel.

Steel which is to be used for making tools with teeth, such as
taps, reamers and milling cutters, should not be annealed too much.
When the steel is too soft it is more apt to tear in cutting and
makes it more difficult to cut a smooth thread or other surface.
Moderate annealing is found best for tools of this kind.

Next: Tool Or Crucible Steel

Previous: Annealing

Add to Add to Reddit Add to Digg Add to Add to Google Add to Twitter Add to Stumble Upon
Add to Informational Site Network

Viewed 3112