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Steel Making

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

Refining The Grain
This is remedied by reheating the piece to a temperature slig...

Introduction Of Carbon
The matter to which these notes are primarily directed is the...

The Care Of Carburizing Compounds
Of all the opportunities for practicing economy in the heat-t...

Cyanide Bath For Tool Steels
All high-carbon tool steels are heated in a cyanide bath. Wi...

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

Annealing Of Rifle Components At Springfield Armory
In general, all forgings of the components of the arms manufa...

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

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

Piston Pin
The piston pin on an aviation engine must possess maximum res...

Lathe And Planer Tools
TO FORGE.--Gently warm the steel to remove any chill is parti...

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

Gas Consumption For Carburizing
Although the advantages offered by the gas-fired furnace for ...

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

Carbon Steels For Different Tools
All users of tool steels should carefully study the different...

Hints For Tool Steel Users
Do not hesitate to ask for information from the maker as to t...

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

Silicon
Silicon prevents, to a large extent, defects such as gas bubb...

Take Time For Hardening
Uneven heating and poor quenching has caused loss of many ve...

William Kelly's Air-boiling Process
An account of Bessemer's address to the British Association w...



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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