Steelmaking.ca Home Steel Making Categories Manufacturing and the Economy of Machinery

Steel Making

Furnace Data
In order to give definite information concerning furnaces, fu...

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

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

Effect Of A Small Amount Of Copper In Medium-carbon Steel
This shows the result of tests by C. R. Hayward and A. B. Joh...

Detrimental Elements
Sulphur and phosphorus are two elements known to be detrimen...

A Chromium-cobalt Steel
The Latrobe Steel Company make a high-speed steel without tun...

Typical Oil-fired Furnaces
Several types of standard oil-fired furnaces are shown herew...

Steel Worked In Austenitic State
As a general rule steel should be worked when it is in the a...

Annealing Method
Forgings which are too hard to machine are put in pots with ...

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

For Milling Cutters And Formed Tools
FORGING.--Forge as before.--ANNEALING.--Place the steel in a ...

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

Hardening Operation
Hardening a gear is accomplished as follows: The gear is tak...

Brown Automatic Signaling Pyrometer
In large heat-treating plants it has been customary to mainta...

Leeds And Northrup Optical Pyrometer
The principles of this very popular method of measuring tempe...

Annealing
There is no mystery or secret about the proper annealing of d...

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

Protectors For Thermo-couples
Thermo-couples must be protected from the danger of mechanica...

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

The Leeds And Northrup Potentiometer System
The potentiometer pyrometer system is both flexible and subst...



Annealing Alloy Steel






Category: ANNEALING

The term alloy steel, from the steel maker's point of view, refers
largely to nickel and chromium steel or a combination of both. These
steels are manufactured very largely by the open-hearth process,
although chromium steels are also a crucible product. It is next
to impossible to give proper directions for the proper annealing
of alloy steel unless the composition is known to the operator.

Nickel steels may be annealed at lower temperatures than carbon
steels, depending upon their alloy content. For instance, if a
pearlitic carbon steel may be annealed at 1,450 deg.C., the same analysis
containing 2-1/2 per cent nickel may be annealed at 1,360 deg.C. and
a 5 per cent nickel steel at 1,270 deg..

In order that high chromium steels may be readily machined, they
must be heated at or slightly above the critical for a very long
time, and cooled through the critical at an extremely slow rate.
For a steel containing 0.9 to 1.1 per cent carbon, under 0.50 per
cent manganese, and about 1.0 per cent chromium, Bullens recommends
the following anneal:

1. Heat to 1,700 or 1,750 deg.F.
2. Air cool to about 800 deg.F.
3. Soak at 1,425 to 1,450 deg.F.
4. Cool slowly in furnace.





Next: High-carbon Machinery Steel

Previous: Tool Or Crucible Steel



Add to Informational Site Network
Report
Privacy
ADD TO EBOOK


Viewed 5199