For the magic practitioner wishing to test their skill, there is a way to do this. You must be relatively advanced as a witch to use the magical method, but once you learn it's fun and entertaining. This type of magic is al... Read more of TO CHANGE YOUR EYE COLOR at White Magic.caInformational Site Network Informational
Privacy
   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

Hardening High-speed Steels
We will now take up the matter of hardening high-speed steels...

Properties Of Steel
Steels are known by certain tests. Early tests were more or l...

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

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

Nickel-chromium
A combination of the characteristics of nickel and the charac...

Effect Of Different Carburizing Material
[Illustrations: FIGS. 33 to 37.] Each of these different p...

Detrimental Elements
Sulphur and phosphorus are two elements known to be detrimen...

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

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

Placing Of Pyrometers
When installing a pyrometer, care should be taken that it re...

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

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

Rate Of Absorption
According to Guillet, the absorption of carbon is favored by ...

Knowing What Takes Place
How are we to know if we have given a piece of steel the ver...

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

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

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

Carburizing Low-carbon Sleeves
Low-carbon sleeves are carburized and pushed on malleable-ir...

Preventing Decarbonization Of Tool Steel
It is especially important to prevent decarbonization in such...

Quenching
It is considered good practice to quench alloy steels from th...



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 2999