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Steel Making

Machineability
Reheating for machine ability was done at 100 deg. less than ...

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

Gears
The material used for all gears on the Liberty engine was sel...

Heating Of Manganese Steel
Another form of heat-treating furnace is that which is used ...

Correction For Cold-junction Errors
The voltage generated by a thermo-couple of an electric pyrom...

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

Hardening High-speed Steels
We will now take up the matter of hardening high-speed steels...

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

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

Phosphorus
PHOSPHORUS is an element (symbol P) which enters the metal fr...

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

Quenching The Work
In some operations case-hardened work is quenched from the bo...

The Penetration Of Carbon
Carburized mild steel is used to a great extent in the manufa...

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

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

Corrosion
This steel like any other steel when distorted by cold worki...

Alloying Elements
Commercial steels of even the simplest types are therefore p...

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

Separating The Work From The Compound
During the pulling of the heat, the pots are dumped upon a ca...

Hardening High-speed Steel
In forging use coke for fuel in the forge. Heat steel slowly ...



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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