With this broom, tool of my will, I do cleanse, purify and prepare this space. From this circle now I banish all fear, malice and misfortune, that this circle may be a fit meeting place for gods and men. As I do will, so mote it be.... Read more of BROOM HOME CLEANSING at White Magic.caInformational Site Network Informational
Privacy
   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

Hardening
Steel is hardened by quenching from above the upper critical....

Sulphur
SULPHUR is another element (symbol S) which is always found i...

The Effect Of Tempering On Water-quenched Gages
The following information has been supplied by Automatic and ...

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

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

Tempering Round Dies
A number of circular dies of carbon tool steel for use in too...

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

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

Shrinking And Enlarging Work
Steel can be shrunk or enlarged by proper heating and cooling...

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

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

Molybdenum
Molybdenum steels have been made commercially for twenty-five...

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

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

Carbon In Tool Steel
Carbon tool steel, or tool steel as it is commonly called, us...

The Modern Hardening Room
A hardening room of today means a very different place from ...

Protective Screens For Furnaces
Workmen needlessly exposed to the flames, heat and glare from...

Calibration Of Pyrometer With Common Salt
An easy and convenient method for standardization and one whi...

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

The Penetration Of Carbon
Carburized mild steel is used to a great extent in the manufa...



Annealing Work






Category: HEAT TREATMENT OF STEEL

With the exception of several of the higher types
of alloy steels, where the percentages of special elements run quite
high, which causes a slight air-hardening action, the carburizing
steels are soft enough for machining when air cooled from any
temperature, including the finishing temperature at the hammer.
This condition has led many drop-forge and manufacturing concerns
to consider annealing as an unnecessary operation and expense.
In many cases the drop forging has only been heated to a low
temperature, often just until the piece showed color, to relieve
the so-called hammer strains. While this has been only a compromise
it has been better than no reheating at all, although it has not
properly refined the grain, which is necessary for good machining
conditions.

Annealing is heating to a temperature slightly above the highest
critical point and cooling slowly either in the air or in the furnace.
Annealing is done to accomplish two purposes: (1) to relieve mechanical
strains and (2) to soften and produce a maximum refinement of grain.





Next: Process Of Carburizing

Previous: Heat Treatment Of Gear Blanks



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 3292