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   Home - Steel Making - Categories - Manufacturing and the Economy of Machinery

Steel Making

Temperatures To Use
As soon as the temperature of the steel reaches 100 deg.C. (...

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

Hardness Testing
The word hardness is used to express various properties of me...

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

Tool Or Crucible Steel
Crucible steel can be annealed either in muffled furnace or b...

Hardening
The forgings can be hardened by cooling in still air or quen...

Properties Of Alloy Steels
The following table shows the percentages of carbon, manganes...

Annealing
There is no mystery or secret about the proper annealing of d...

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 ...

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

Suggestions For Handling High-speed Steels
The following suggestions for handling high-speed steels are ...

Shrinking And Enlarging Work
Steel can be shrunk or enlarged by proper heating and cooling...

Tempering Round Dies
A number of circular dies of carbon tool steel for use in too...

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

Affinity Of Nickel Steel For Carbon
The carbon- and nickel-steel gears are carburized separately...

Preventing Cracks In Hardening
The blacksmith in the small shop, where equipment is usually ...

Carbon In Tool Steel
Carbon tool steel, or tool steel as it is commonly called, us...

Fatigue Tests
It has been known for fifty years that a beam or rod would fa...

Double Annealing
Water annealing consists in heating the piece, allowing it to...



Non-shrinking Oil-hardening Steels






Category: ALLOYS AND THEIR EFFECT UPON STEEL

Certain steels have a very low rate of expansion and contraction
in hardening and are very desirable for test plugs, gages, punches
and dies, for milling cutters, taps, reamers, hard steel bushings
and similar work.

It is recommended that for forging these steels it be heated slowly
and uniformly to a bright red, but not in a direct flame or blast.
Harden at a dull red heat, about 1,300 deg.F. A clean coal or coke
fire, or a good muffle-gas furnace will give best results. Fish
oil is good for quenching although in some cases warm water will
give excellent results. The steel should be kept moving in the bath
until perfectly cold. Heated and cooled in this way the steel is
very tough, takes a good cutting edge and has very little expansion
or contraction which makes it desirable for long taps where the
accuracy of lead is important.

The composition of these steels is as follows:

Per cent
Manganese 1.40 to 1.60
Carbon 0.80 to 0.90
Vanadium 0.20 to 0.25





Next: Effect Of A Small Amount Of Copper In Medium-carbon Steel

Previous: Properties Of Alloy Steels



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