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Steel Making

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

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

Connecting Rods
The material used for all connecting rods on the Liberty engi...

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

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

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

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

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

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

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

Crucible Steel
Crucible steel is still made by melting material in a clay or...

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

The Effect Of Tempering On Water-quenched Gages
The following information has been supplied by Automatic and ...

Rate Of Absorption
According to Guillet, the absorption of carbon is favored by ...

Heat Treatment Of Lathe Planer And Similar Tools
FIRE.--For these tools a good fire is one made of hard foundr...

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

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

Complete Calibration Of Pyrometers
For the complete calibration of a thermo-couple of unknown e...

Heat Treatment Of Gear Blanks
This section is based on a paper read before the American Gea...

Bessemer Process
The bessemer process consists of charging molten pig iron int...



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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