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Tempering Round Dies
A number of circular dies of carbon tool steel for use in too...

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

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

Nickel
Nickel may be considered as the toughest among the non-rare a...

Vanadium
Vanadium has a very marked effect upon alloy steels rich in c...

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

Impact Tests
Impact tests are of considerable importance as an indication ...

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

The Effect
The heating at 1,600 deg.F. gives the first heat treatment w...

Conclusions
Martien was probably never a serious contender for the honor ...

High-chromium Or Rust-proof Steel
High-chromium, or what is called stainless steel containing f...

Heat Treatment Of Steel
Heat treatment consists in heating and cooling metal at defin...

Temperature For Annealing
Theoretically, annealing should be accomplished at a tempera...

Hardening
Steel is hardened by quenching from above the upper critical....

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

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

Heat-treating Equipment And Methods For Mass Production
The heat-treating department of the Brown-Lipe-Chapin Company...

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

Carburizing Material
The simplest carburizing substance is charcoal. It is also th...

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



Heat Treatment Of Milling Cutters Drills Reamers Etc






Category: HIGH-SPEED STEEL

THE FIRE.--Gas and electric furnaces designed for high heats are
now made for treating high-speed steels. We recommend them for
treating all kinds of Blue Chip tools and particularly the above
class. After tools reach a yellow heat in the forge fire they must
not be allowed to touch the fuel or come in contact with the blast
or surrounding air.

HEATING.--Tools of this kind should be heated to a mellow white
heat, or as hot as possible without injuring the cutting edges
(2,000 to 2,200 deg.F.). For most work the higher the heat the better
the tool. Where furnaces are used, we recommend preheating the
tools to a red heat in one furnace before putting them in a white
hot furnace.

COOLING.--We recommend quenching all of the above tools in oil
when taken from the fire. We have found fish oil, cottonseed oil,
Houghton's No. 2 soluble oil and linseed oil satisfactory. The
high heat is the important thing in hardening Blue Chip tools.
If a white hot tool is allowed to cool in the open air it will be
hard, but the air scales the tool.

DRAWING THE TEMPER.--Tools of this class should be drawn considerably
more than water-hardening steel for the same purpose.





Next: Heat Treatment Of Punches And Dies Shears Taps Etc

Previous: Heat Treatment Of Lathe Planer And Similar Tools



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