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

Steel Making

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

Tool Or Crucible Steel
Crucible steel can be annealed either in muffled furnace or b...

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

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

The Forging Of Steel
So much depends upon the forging of steel that this operation...

Composition Of Transmission-gear Steel
If the nickel content of this steel is eliminated, and the pe...

Quenching The Work
In some operations case-hardened work is quenched from the bo...

Restoring Overheated Steel
The effect of heat treatment on overheated steel is shown gra...

Cutting-off Steel From Bar
To cut a piece from an annealed bar, cut off with a hack saw,...

Uses Of The Various Tempers Of Carbon Tool Steel
DIE TEMPER.--No. 3: All kinds of dies for deep stamping, pres...

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

Silicon
SILICON is a very widespread element (symbol Si), being an es...

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

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

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

Pyrometers
Armor plate makers sometimes use the copper ball or Siemens' ...

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

Application Of Liberty Engine Materials To The Automotive Industry
The success of the Liberty engine program was an engineer...

Hints For Tool Steel Users
Do not hesitate to ask for information from the maker as to t...

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



Temperature For Annealing






Category: HEAT TREATMENT OF STEEL

Theoretically, annealing should be
accomplished at a temperature at just slightly above the critical
point. However, in practice the temperature is raised to a higher
point in order to allow for the solution of the carbon and iron to
be produced more rapidly, as the time required to produce complete
solution is reduced as the temperature increases past the critical
point.

For annealing the simpler types of low-carbon steels the following
temperatures have been found to produce uniform machining conditions
on account of producing uniform fine-grain pearlite structure:

0.15 to 0.25 per cent carbon, straight carbon steel.--Heat to 1,650 deg.F.
Hold at this temperature until the work is uniformly heated; pull
from the furnace and cool in air.

0.15 to 0.25 per cent carbon, 1-1/2 per cent nickel, 1/2 per cent
chromium steel.--Heat to 1,600 deg.F. Hold at this temperature until
the work is uniformly heated; pull from the furnace and cool in air.

0.15 to 0.25 per cent carbon, 3-1/2 per cent nickel steel.--Heat
to 1,575 deg.F. Hold at this temperature until the work is uniformly
heated; pull from the furnace and cool in air.





Next: Care In Annealing

Previous: Effects Of Proper 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 3061