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Protectors For Thermo-couples
Thermo-couples must be protected from the danger of mechanica...

Properties Of Steel
Steels are known by certain tests. Early tests were more or l...

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

Pyrometers
Armor plate makers sometimes use the copper ball or Siemens' ...

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

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

Carbon-steel Forgings
Low-stressed, carbon-steel forgings include such parts as car...

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

Detrimental Elements
Sulphur and phosphorus are two elements known to be detrimen...

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

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

Furnace Data
In order to give definite information concerning furnaces, fu...

Cutting-off Steel From Bar
To cut a piece from an annealed bar, cut off with a hack saw,...

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

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

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...

Composition Of Transmission-gear Steel
If the nickel content of this steel is eliminated, and the pe...

Preparing Parts For Local Case-hardening
At the works of the Dayton Engineering Laboratories Company, ...

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



High Speed Steel






Category: HIGH-SPEED STEEL

For centuries the secret art of making tool steel was handed down
from father to son. The manufacture of tool steel is still an art
which, by the aid of science, has lost much of its secrecy; yet
tool steel is today made by practical men skilled as melters,
hammer-men, and rollers, each knowing his art. These practical
men willingly accept guidance from the chemist and metallurgists.

A knowledge of conditions existing today in the manufacture of
high-speed steel is essential to steel treaters. It is well for
the manufacturer to have steel treaters understand some of his
troubles and difficulties, so that they will better comprehend the
necessity of certain trade customs and practices, and, realizing
the manufacturer's desire to cooperate with them, will reciprocate.

The manufacturer of high-speed steel knows and appreciates the
troubles and difficulties that may sometimes arise in the heat-treating
of his product. His aim is to make a uniform steel that will best
meet the requirements of the average machine shop on general work,
and at the same time allow the widest variation in heat treatment
to give desired results.

High speed steel is one of the most complex alloys known. A
representative steel contains approximately 24 per cent of alloying
metals, namely, tungsten, chromium, vanadium, silicon, manganese,
and in addition there is often found cobalt, molybdenum, uranium,
nickel, tin, copper and arsenic.





Next: Standard Analysis

Previous: Tempering Colors On Carbon Steels



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