METAL PROPERTIES, CHAR, USES, AND CODES - OD1643 - LESSON 1/TASK 1
oxide rutile.
Today a relatively pure form of titanium metal is
found throughout the world.
It is a very soft, silvery white,
medium-strength metal having very good corrosion resistance.
(a) Uses.
Titanium is used as an alloy agent for aluminum,
copper, magnesium steel, nickel, and other metals.
It is also used
in making powder for pyrotechnics and in manufacturing turbine
blades, aircraft firewalls, engine nacelles, frame assemblies,
ammunition tracks, and mortar base plates.
(b) Capabilities.
Titanium can be machined at low and fast
feeds, formed spot and seam-welded, and fusion-welded with inert gas.
(c) Limitations.
Titanium has low impact strength, seizing
tendencies, and low creep strength at elevated temperatures (above
800 F). It can be cast into simple shapes only.
(12) Tungsten.
The chemical symbol for tungsten is W, and it is
extracted in its pure state from wolframite and scheslite.
It is
hard, brittle, and nonmagnetic, and forms an oxide when heated in
air.
(a) Uses. Tungsten is used in the manufacture of incandescent
lamp filaments and phonograph needles; and as an alloying agent in
the production of nonconsumable welding electrodes, armorplate, high-
speed steel, and projectiles.
(b) Capabilities.
Tungsten can be cold- and hot-drawn.
(c) Limitations.
Tungsten is hard to machine, requires high
temperatures for melting, and is usually produced by powdered
metallurgy (sintering process).
(13) Zinc. The chemical symbol for zinc is Zn, and its principal
ores are the sulfide blends, silicates such as willemite, and oxides
such as franklite and zincite.
(a) Uses. The largest use of zinc is in galvanizing such items
as pipe, tubing, sheet metal, and wire nails. It is also used as an
alloying element in producing alloys such as brass, bronze, and in
those alloys that are composed primarily of zinc itself.
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