Informational Site NetworkInformational Site Network
Privacy
 
   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

A Satisfactory Luting Mixture
A mixture of fireclay and sand will be found very satisfactor...

Quenching Tool Steel
To secure proper hardness, the cooling of quenching of steel ...

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

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

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

The Quenching Tank
The quenching tank is an important feature of apparatus in c...

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

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

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

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

Alloying Elements
Commercial steels of even the simplest types are therefore p...

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

Blending The Compound
Essentially, this consists of the sturdy, power-driven separa...

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

Bessemer Process
The bessemer process consists of charging molten pig iron int...

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

Using Illuminating Gas
The choice of a carburizing furnace depends greatly on the fa...

Complete Calibration Of Pyrometers
For the complete calibration of a thermo-couple of unknown e...

Quality And Structure
The quality of high-speed steel is dependent to a very great ...

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



Double Annealing






Category: HARDENING CARBON STEEL FOR TOOLS

Water annealing consists in heating the piece, allowing it to cool
in air until it loses its red heat and becomes black and then
immediately quenching it in water. This plan works well for very
low-carbon steel; but for high-carbon steel what is known as the
double annealing treatment must be given, provided results are
wanted quickly. The process consists in heating the steel quickly to
200 deg. or more above the upper critical, cooling in air down through
the recalescence point, then reheating it to just above the critical
point and again cooling slowly through the recalescence, then quenching
in oil. This process retains in the steel a fine-grained structure
combined with softness.





Next: Quenching Tool Steel

Previous: Annealing To Relieve Internal Stresses



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 7146