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Steel Making

Forging High-speed Steel
Heat very slowly and carefully to from 1,800 to 2,000 deg.F....

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

High-carbon Machinery Steel
The carbon content of this steel is above 30 points and is ha...

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...

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

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

Placing The Thermo-couples
The following illustrations from the Taylor Instrument Compan...

Quality And Structure
The quality of high-speed steel is dependent to a very great ...

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

Heat-treating Equipment And Methods For Mass Production
The heat-treating department of the Brown-Lipe-Chapin Company...

Sulphur is another impurity and high sulphur is even a greate...

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

Rate Of Cooling
At the option of the manufacturer, the above treatment of gea...

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

Chromium when alloyed with steel, has the characteristic func...

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

Plant For Forging Rifle Barrels
The forging of rifle barrels in large quantities and heat-tre...

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

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

Heat Treatment Of Punches And Dies Shears Taps Etc


HEATING.--The degree to which tools of the above classes should
be heated depends upon the shape, size and use for which they are
intended. Generally, they should not be heated to quite as high a
heat as lathe tools or milling cutters. They should have a high
heat, but not enough to make the flux run on the steel (by pyrometer
1,900 to 2,100 deg.F.).

COOLING.--Depending on the tools, some should be dipped in oil
all over, some only part way, and others allowed to cool down in
the air naturally, or under air blast. In cooling, the toughness
is retained by allowing some parts to cool slowly and quenching
parts that should be hard.

DRAWING THE TEMPER.--As in cooling, some parts of these tools will
require more drawing than others, but, on the whole, they must
be drawn more than water hardening tools for the same purpose or
to about 500 deg.F. all over, so that a good file will just touch
the cutting or working parts.

BARIUM CHLORIDE PROCESS.--This is a process developed for treating
certain classes of tools, such as taps, forming tools, etc. It is
being successfully used in many large plants. Briefly the treatment
is as follows:

In this treatment the tools are first preheated to a red heat,
but small tools may be immersed without preheating. The barium
chloride bath is kept at a temperature of from 2,000 to 2,100 deg.F.,
and tools are held in it long enough to reach the same temperature.
They are then dipped in oil. The barium chloride which adheres
to the tools is brushed off, leaving the tools as dean as before

Next: A Chromium-cobalt Steel

Previous: Heat Treatment Of Milling Cutters Drills Reamers Etc

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