Superstitions.ca - Find thousands of old superstitions and urban legends taken from around the world divided into themed categories. Visit Superstitions.caInformational Site Network Informational
Privacy
   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

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

Hardening High-speed Steel
In forging use coke for fuel in the forge. Heat steel slowly ...

Judging The Heat Of Steel
While the use of a pyrometer is of course the only way to hav...

Plant For Forging Rifle Barrels
The forging of rifle barrels in large quantities and heat-tre...

Refining The Grain
This is remedied by reheating the piece to a temperature slig...

Instructions For Working High-speed Steel
Owing to the wide variations in the composition of high-speed...

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

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

Piston Pin
The piston pin on an aviation engine must possess maximum res...

Heavy Forging Practice
In heavy forging practice where the metal is being worked at...

Silicon
Silicon prevents, to a large extent, defects such as gas bubb...

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

Tensile Properties
Strength of a metal is usually expressed in the number of pou...

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

Correction By Zero Adjustment
Many pyrometers are supplied with a zero adjuster, by means ...

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

Carburizing By Gas
The process of carburizing by gas, briefly mentioned on page ...

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

S A E Heat Treatments
The Society of Automotive Engineers have adopted certain heat...

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



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 3485