Tungsten carbide, WC, or tungsten semi-carbide, W2C, is a chemical compound containing tungsten and carbon, similar to titanium carbide. Colloquially, tungsten carbide is often simply called carbide.
Carbide cutting surfaces are often useful when machining through
materials such as carbon steel or stainless steel, as well as in
situations where other tools would wear away, such as high-quantity
production runs. Most of the time, carbide will leave a better finish
on the part, and allow faster machining. Carbide tools can also
withstand higher temperatures than standard high speed steel tools. The
material is usually tungsten-carbide cobalt, also called "cemented
carbide", a metal matrix composite where tungsten carbide particles are
the aggregate and metallic cobalt serves as the matrix.
The
process of combining tungsten carbide with cobalt is referred to as
sintering or Hot Isostatic Pressing (HIP). During this process cobalt
eventually will be entering the liquid stage and WC grains (>>
higher melting point) remain in the solid stage. As a result of this
process cobalt is embedding/cementing the WC grains and thereby creates
the metal matrix composite with its distinct material properties. The
naturally ductile cobalt metal serves to offset the characteristic
brittle behavior of the tungsten carbide ceramic, thus raising its
toughness and durability. Such parameters of tungsten carbide can be
changed significantly within the carbide manufacturers sphere of
influence, primarily determined by grain size, cobalt content, dotation
(e.g. alloy carbides) and carbon content.
Machining with carbide can be difficult, as carbide is more brittle than other tool materials, making it susceptible to chipping and breaking. To offset this, many manufacturers sell carbide inserts and matching insert holders. With this setup, the small carbide insert is held in place by a larger tool made of a less brittle material (usually steel). This gives the benefit of using carbide without the high cost of making the entire tool out of carbide. Most modern face mills use carbide inserts, as well as some lathe tools and endmills.
To increase the life
of carbide tools, they are sometimes coated. Four such coatings are TiN
(titanium nitride), TiC (titanium carbide), Ti(C)N (titanium
carbide-nitride), and TiAlN (Titanium Aluminum Nitride). (Newer
coatings, known as DLC (Diamond Like Coating) are beginning to surface,
enabling the cutting power of diamond without the unwanted chemical
reaction between real diamond and iron.)
Most coatings generally
increase a tool's hardness and/or lubricity. A coating allows the
cutting edge of a tool to cleanly pass through the material without
having the material gall (stick) to it. The coating also helps to
decrease the temperature associated with the cutting process and
increase the life of the tool. The coating is usually deposited via
thermal CVD and, for certain applications, with the mechanical PVD
method. However if the deposition is performed at too high temperature,
an eta phase of a Co6W6C tertiary carbide forms at the interface
between the carbide and the cobalt phase, facilitating adhesion failure
of the coating.
Bewise Inc. www.tool-tool.com Reference source from the internet.
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BW Bewise Inc. Willy Chen willy@tool-tool.com bw@tool-tool.com www.tool-tool.com skype:willy_chen_bw mobile:0937-618-190 Head &Administration Office No.13,Shiang Shang 2nd St., West Chiu Taichung,Taiwan 40356 http://www.tool-tool.com / FAX:+886 4 2471 4839 N.Branch 5F,No.460,Fu Shin North Rd.,Taipei,Taiwan S.Branch No.24,Sec.1,Chia Pu East Rd.,Taipao City,Chiayi Hsien,Taiwan
Welcome to BW tool world! We are an experienced tool maker specialized in cutting tools. We focus on what you need and endeavor to research the best cutter to satisfy users’ demand. Our customers involve wide range of industries, like mold & die, aerospace, electronic, machinery, etc. We are professional expert in cutting field. We would like to solve every problem from you. Please feel free to contact us, its our pleasure to serve for you. BW product including: cutting tool、aerospace tool .HSS DIN Cutting tool、Carbide end mills、Carbide cutting tool、NAS Cutting tool、NAS986 NAS965 NAS897 NAS937orNAS907 Cutting Tools,Carbide end mill、disc milling cutter,Aerospace cutting tool、hss drill’Фрезеры’Carbide drill、High speed steel、Compound Sharpener’Milling cutter、INDUCTORS FOR PCD’CVDD(Chemical Vapor Deposition Diamond )’PCBN (Polycrystalline Cubic Boron Nitride) ’Core drill、Tapered end mills、CVD Diamond Tools Inserts’PCD Edge-Beveling Cutter(Golden Finger’PCD V-Cutter’PCD Wood tools’PCD Cutting tools’PCD Circular Saw Blade’PVDD End Mills’diamond tool. INDUCTORS FOR PCD . POWDER FORMING MACHINE ‘Single Crystal Diamond ‘Metric end mills、Miniature end mills、Специальные режущие инструменты ‘Пустотелое сверло ‘Pilot reamer、Fraises’Fresas con mango’ PCD (Polycrystalline diamond) ‘Frese’POWDER FORMING MACHINE’Electronics cutter、Step drill、Metal cutting saw、Double margin drill、Gun barrel、Angle milling cutter、Carbide burrs、Carbide tipped cutter、Chamfering tool、IC card engraving cutter、Side cutter、Staple Cutter’PCD diamond cutter specialized in grooving floors’V-Cut PCD Circular Diamond Tipped Saw Blade with Indexable Insert’ PCD Diamond Tool’ Saw Blade with Indexable Insert’NAS tool、DIN or JIS tool、Special tool、Metal slitting saws、Shell end mills、Side and face milling cutters、Side chip clearance saws、Long end mills’end mill grinder’drill grinder’sharpener、Stub roughing end mills、Dovetail milling cutters、Carbide slot drills、Carbide torus cutters、Angel carbide end mills、Carbide torus cutters、Carbide ball-nosed slot drills、Mould cutter、Tool manufacturer.
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BW специализируется в научных исследованиях и разработках, и снабжаем самым высокотехнологичным карбидовым материалом для поставки режущих / фрезеровочных инструментов для почвы, воздушного пространства и электронной индустрии. В нашу основную продукцию входит твердый карбид / быстрорежущая сталь, а также двигатели, микроэлектрические дрели, IC картонорезальные машины, фрезы для гравирования, режущие пилы, фрезеры-расширители, фрезеры-расширители с резцом, дрели, резаки форм для шлицевого вала / звездочки роликовой цепи, и специальные нано инструменты. Пожалуйста, посетите сайт www.tool-tool.com для получения большей информации.
BW is specialized in R&D and sourcing the most advanced carbide material with high-tech coating to supply cutting / milling tool for mould & die, aero space and electronic industry. Our main products include solid carbide / HSS end mills, micro electronic drill, IC card cutter, engraving cutter, shell end mills, cutting saw, reamer, thread reamer, leading drill, involute gear cutter for spur wheel, rack and worm milling cutter, thread milling cutter, form cutters for spline shaft/roller chain sprocket, and special tool, with nano grade. Please visit our web www.tool-tool.com for more info.
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