01
TUNGSTEN
CARBIDE
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KATIE SCARLETT AFRICA AVILA CAMPOS
DISEÑO INDUSTRIAL
UNIVERSIDAD DE GUADALAJARA
2ND EXAM
02
Binding tungsten and carbon, it forms an
extremely dense crystal structure called
hexagonal crystal, whose Young’s modulus is
approximately 550 GPa, which is nearly two times
that of steel.
Properties
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HIGH HARDNESS
HIGH STRENGHT AT
HIGH TEMPERATURE
HIGH RESISTANCE
TO CORROSION
The Mohs’ hardness of tungsten carbide is “9.”
It boasts a level of hardness second to
diamond.
Since it has high strength at high temperature
and low thermal expansion coefficient, it is an
optimal raw material for cutting tools to be
used in a high-temperature and high-speed
environment.
Tungsten carbide is an extremely stable
substance, and it does not oxidize at normal
temperatures in air. In addition, it is not likely
to form a solid solution with various elements,
and keeps stable characteristics even in
severe environments.
03
RESISTANCE TO OXIDATION
Oxidation occurs at approximately 300℃ and reaction occurs
rapidly at approximately 700℃ to form an oxide (WO₃) when its
powder is heated in an oxygen-containing atmosphere.
CHARACTERISTICS
CHEMICAL RESISTANCE
Although it does not dissolve in water, hydrochloric acid or sulfuric
acid, it dissolves in nitic acid.
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REACTIVITY
Reacts with chlorine at 400℃ or higher.
Reacts with fluorine at 18℃.
MANUFACTURING
PROCESSES OF
TUNGSTEN CARBIDE
POWDER FROM FINE
TO COARSE GRAIN
TUNGSTEN OXIDE POWDER
HYDROGEN REDUCTION
TUNGSTEN POWDER
MIXTURE OF CARBON
TUNGSTEN POWDER + CARBON POWDER
CARBONIZATION PROCESS
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PULVERIZATION PROCESS
SIEVING PROCESS
TUNGSTEIN CARBIDE POWDER
( 0.5 ~ 15 MICRÓMETRO )
SSECORP NOITCUDER
04
05
THE MANUFACTURING PROCESS
OF A TUNGSTEN CARBIDE RING
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Tungsten with carbon and other elements are
ground into a powder and then compressed with
high heat and pressure dies to form a ring blank. The
blank is then fired in an oxygen-free furnace at an
astounding 6,200 degrees Fahrenheit. This process
called sintering creates the hardest metal alloy used
in making jewelry.
The ring is then cut and shaped using diamond tools
with up to 40 total separate steps required for
completion. The cutting and shaping of a tungsten
ring is similar in many ways to the cutting and
polishing of a rough diamond. Precious metal Inlay
rings with gold, silver or platinum are created by
grinding a channel in the center of the ring and
precisely "swedging" the metal into the channel
under extreme pressure.
The ring is then skillfully polished with diamond
polishing tools and wheels creating a permanent
luster and polish not possible with other metals. A
Tungsten Carbide ring will remain polished forever,
and is virtually impossible to scratch. It is a unique
metal that epitomizes today's technologically
advanced man more than any other.
06
THE DESIGN:
TUNGSTEN CARBIDE RING
Tungsten Carbide is the only rare and exotic metal that can
promise a permanence in polish and finish that will endure
until the end of time with your tungsten wedding bands.
The original pattern and design in many gold rings will all but
disappear after several years. Tungsten Rings will maintain
an everlasting beautiful and shiny finish. The heavy weight
and the enduring finish of a tungsten carbide ring, speak of
commitment, security and an everlasting bond.
Tungsten Rings are the most wear-resistant rings available
on the planet. Is about 10 times harder than 18K Gold, 5
times harder than tool steel, and 4 times harder than
titanium. Tungsten measures between 8 and 9 on the Mohs
hardness scale. (Diamonds are a 10 - the highest.).
Due to their extreme hardness, Tungsten Rings will hold their
shape and shine longer than any ring on the market, they will
not bend, and they have been referred as "permantly
polished rings".
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