By the side of a wood, in a country a long way off, ran a fine stream of water; and upon the stream there stood a mill. The miller's house was close by, and the miller, you must know, had a very beautiful daughter. She was, moreover, very shrew... Read more of Rumpelstiltskin at Children Stories.caInformational Site Network Informational
   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

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

Robert Mushet
Robert (Forester) Mushet (1811-1891), born in the Forest of D...

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

Correction By Zero Adjustment
Many pyrometers are supplied with a zero adjuster, by means ...

The Theory Of Tempering
Steel that has been hardened is generally harder and more br...

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

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

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

Surface Carburizing
Carburizing, commonly called case-hardening, is the art of pr...

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

Effects Of Proper Annealing
Proper annealing of low-carbon steels causes a complete solu...

Annealing Of High-speed Steel
For annealing high-speed steel, some makers recommend using g...

The Effect
The heating at 1,600 deg.F. gives the first heat treatment w...

Typical Oil-fired Furnaces
Several types of standard oil-fired furnaces are shown herew...

Care In Annealing
Not only will benefits in machining be found by careful anne...

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

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

Heat Treatment Of Steel
Heat treatment consists in heating and cooling metal at defin...

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

Tensile Properties
Strength of a metal is usually expressed in the number of pou...

Lathe And Planer Tools


FORGING.--Gently warm the steel to remove any chill, is particularly
desirable in the winter, then heat slowly and carefully to a scaling
heat, that is a lemon heat (1,800 to 2,000 deg.F.), and forge uniformly.
Reheat the tool for further forging directly the steel begins to
stiffen under the hammer. Under no circumstances forge the steel
when the temperature falls below a dark lemon to an orange color
about 1,700 deg.F. Reheat as often as is necessary to finish forging
the tool to shape. Allow the tool to cool after forging by burying
the tool in dry ashes or lime. Do not place on the damp ground
or in a draught of air.

The heating for forging should be done preferably in a pipe or
muffle furnace but if this is not convenient use a good clean fire
with plenty of fuel between the blast pipe and the tool. Never
allow the tool to soak after the desired forging heat has been
reached. Do not heat the tool further back than is necessary to
shape the tool, but give the tool sufficient heat. See that the
back of the tool is flatly dressed to provide proper support under
the nose of the tool.

HARDENING HIGH-SPEED STEEL.--Slowly reheat the cutting edge of
the tool to a cherry red, 1,400 deg.F., then force the blast so as
to raise the temperature quickly to a full white heat, 2,200 to
2,250 deg.F., that is, until the tool starts to sweat at the cutting
face. Cool the point of the tool in a dry air blast or preferably
in oil, further cool in oil keeping the tool moving until the tool
has become black hot.

To remove hardening strains reheat the tool to from 500 to 1,100 deg.F.
Cool in oil or atmosphere. This second heat treatment adds to the
toughness of the tool and therefore to its life.

GRINDING TOOLS.--Grind tools to remove all scale. Use a quick-cutting,
dry, abrasive wheel. If using a wet wheel, be sure to use plenty
of water. Do not under any circumstances force the tool against
the wheel so as to draw the color, as this is likely to set up
checks on the surface of the tool to its detriment.

Next: For Milling Cutters And Formed Tools

Previous: Cutting-off Steel From Bar

Add to Add to Reddit Add to Digg Add to Add to Google Add to Twitter Add to Stumble Upon
Add to Informational Site Network

Viewed 4109