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Annealing Work
With the exception of several of the higher types of alloy s...

The Thermo-couple
With the application of the thermo-couple, the measurement of...

Temperatures To Use
As soon as the temperature of the steel reaches 100 deg.C. (...

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

Quenching
It is considered good practice to quench alloy steels from th...

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

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

The Packing Department
In Fig. 56 is shown the packing pots where the work is packe...

Air-hardening Steels
These steels are recommended for boring, turning and planing...

Affinity Of Nickel Steel For Carbon
The carbon- and nickel-steel gears are carburized separately...

Pickling The Forgings
The forgings were then pickled in a hot solution of either ni...

Drop Forging Dies
The kind of steel used in the die of course influences the he...

Effect Of Different Carburizing Material
[Illustrations: FIGS. 33 to 37.] Each of these different p...

Steel For Chisels And Punches
The highest grades of carbon or tempering steels are to be re...

Compensating Leads
By the use of compensating leads, formed of the same materia...

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

Optical System And Electrical Circuit Of The Leeds & Northrup Optical Pyrometer
For extremely high temperature, the optical pyrometer is lar...

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

Fatigue Tests
It has been known for fifty years that a beam or rod would fa...

The Electric Process
The fourth method of manufacturing steel is by the electric f...



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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