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Steel Making

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

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

Tungsten
Tungsten, as an alloy in steel, has been known and used for a...

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

Forging High-speed Steel
Heat very slowly and carefully to from 1,800 to 2,000 deg.F....

The Theory Of Tempering
Steel that has been hardened is generally harder and more br...

Lathe And Planer Tools
TO FORGE.--Gently warm the steel to remove any chill is parti...

Correction For Cold-junction Errors
The voltage generated by a thermo-couple of an electric pyrom...

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

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

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

Carbon-steel Forgings
Low-stressed, carbon-steel forgings include such parts as car...

Take Time For Hardening
Uneven heating and poor quenching has caused loss of many ve...

Annealing In Bone
Steel and cast iron may both be annealed in granulated bone. ...

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

Manganese
MANGANESE is a metal much like iron. Its chemical symbol is M...

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

High Speed Steel
For centuries the secret art of making tool steel was handed ...

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

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



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



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