This is typical of the cup being too often consulted by some people. It is almost void of meaning, the only symbols indicating a short journey, although the flower near the rim denotes good luck, and the fact that the bottom is clear that n... Read more of INTERPRETATION at Tea Leaf.caInformational Site Network Informational
Privacy
   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

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

Suggestions For Handling High-speed Steels
The following suggestions for handling high-speed steels are ...

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

Forging High-speed Steel
Heat very slowly and carefully to from 1,800 to 2,000 deg.F....

Heat Treatment Of Lathe Planer And Similar Tools
FIRE.--For these tools a good fire is one made of hard foundr...

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

Annealing To Relieve Internal Stresses
Work quenched from a high temperature and not afterward tempe...

Testing And Inspection Of Heat Treatment
The hard parts of the gear must be so hard that a new mill f...

Making Steel Balls
Steel balls are made from rods or coils according to size, st...

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

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

Heat Treatment Of Steel
Heat treatment consists in heating and cooling metal at defin...

Typical Oil-fired Furnaces
Several types of standard oil-fired furnaces are shown herew...

Manganese
MANGANESE is a metal much like iron. Its chemical symbol is M...

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

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

Highly Stressed Parts
The highly stressed parts on the Liberty engine consisted of ...

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

Temperatures To Use
As soon as the temperature of the steel reaches 100 deg.C. (...

For Milling Cutters And Formed Tools
FORGING.--Forge as before.--ANNEALING.--Place the steel in a ...



Annealing Of High-speed Steel






Category: ANNEALING

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 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 3145