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

Phosphorus
Phosphorus is one of the impurities in steel, and it has been...

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

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

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

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

Short Method Of Treatment
In the new method, the packed pots are run into the case-har...

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

Double Annealing
Water annealing consists in heating the piece, allowing it to...

Standard Analysis
The selection of a standard analysis by the manufacturer is t...

Steel Before The 1850's
In spite of a rapid increase in the use of machines and the ...

Critical Points
One of the most important means of investigating the properti...

Classifications Of Steel
Among makers and sellers, carbon tool-steels are classed by g...

Hardening
The forgings can be hardened by cooling in still air or quen...

Chrome-nickel Steel
Forging heat of chrome-nickel steel depends very largely on ...

Preventing Carburizing By Copper-plating
Copper-plating has been found effective and must have a thick...

Non-shrinking Oil-hardening Steels
Certain steels have a very low rate of expansion and contract...

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

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

Hardening Carbon Steel For Tools
For years the toolmaker had full sway in regard to make of st...



Heat Treatment Of Punches And Dies Shears Taps Etc






Category: HIGH-SPEED STEEL

HEATING.--The degree to which tools of the above classes should
be heated depends upon the shape, size and use for which they are
intended. Generally, they should not be heated to quite as high a
heat as lathe tools or milling cutters. They should have a high
heat, but not enough to make the flux run on the steel (by pyrometer
1,900 to 2,100 deg.F.).

COOLING.--Depending on the tools, some should be dipped in oil
all over, some only part way, and others allowed to cool down in
the air naturally, or under air blast. In cooling, the toughness
is retained by allowing some parts to cool slowly and quenching
parts that should be hard.

DRAWING THE TEMPER.--As in cooling, some parts of these tools will
require more drawing than others, but, on the whole, they must
be drawn more than water hardening tools for the same purpose or
to about 500 deg.F. all over, so that a good file will just touch
the cutting or working parts.

BARIUM CHLORIDE PROCESS.--This is a process developed for treating
certain classes of tools, such as taps, forming tools, etc. It is
being successfully used in many large plants. Briefly the treatment
is as follows:

In this treatment the tools are first preheated to a red heat,
but small tools may be immersed without preheating. The barium
chloride bath is kept at a temperature of from 2,000 to 2,100 deg.F.,
and tools are held in it long enough to reach the same temperature.
They are then dipped in oil. The barium chloride which adheres
to the tools is brushed off, leaving the tools as dean as before
heating.





Next: A Chromium-cobalt Steel

Previous: Heat Treatment Of Milling Cutters Drills Reamers Etc



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