TRIBOLOGICAL BEHAVIOR OF WC-CO CARBIDE FILLED WITH …
Tungsten carbide cobalt (WC-CO) is an alloy of a hard ceramic phase, the tungsten carbide (WC) and a ductile metallic phase, the cobalt (Co). Important properties of WC-Co are hardness, strength, high breaking and beating ductility as well as high electrical and thermal conductivity. By varying the metallic cobalt content and the tungsten ...
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Mechanical Properties and Process Improvement of Tungsten ...
The following study presents ongoing work on the mechanical behavior and process improvement of tungsten carbide that is prepared using additive manufacturing of a sustainable polymeric precursor ...
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(PDF) Wear and Corrosion Behavior of Tungsten Carbide ...
The aim of this study is to investigate the wear and corrosion behavior of tungsten carbide 10 wt.% nickel (WC-10Ni) and tungsten carbide 12 wt.% w cobalt (WC-12Co) coating deposited onto medium ...
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Effects of Mechanical Alloying on Sintering Behavior of ...
Effects of Mechanical Alloying on Sintering Behavior of Tungsten Carbide-Cobalt Hard Metal System. Ahmet Ozan Gezerman 1 and Burcu Didem Çorbacıoğlu 1. 1 Department of Chemical Engineering, Faculty of Chemical and Metallurgical Engineering, Yıldız Technical University, Istanbul, Turkey.
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The effect of heat treatment and impact angle on the ...
Moreover, Beste et al. mentioned that the size distribution of tungsten carbide particles as well as the binder percentage can significantly affect the erosion rate of cemented carbides and switch their erosion behavior from ductile to brittle mode and vice versa. This issue will be further discussed in Sect. 4.3.2 where the erosion features ...
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Is Tungsten Carbide toxic? - Quora
Answer (1 of 3): So I see a good answer below. Dr. Knott's work on tungsten poisoning is what we have to go off of for now. It doesn't appear that acute exposure/poisoning is a likely possibility with past, French military drinking "game" posing as the basis for his case study where tungsten in t...
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Effects of Mechanical Alloying on Sintering Behavior of ...
ResearchArticle Effects of Mechanical Alloying on Sintering Behavior of Tungsten Carbide-Cobalt Hard Metal System AhmetOzanGezermanandBurcuDidemÇorbacJoLlu
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Dissolving Behavior of Tungsten Carbide in Surface Welded ...
Dissolving behavior of tungsten carbide in surface welded. using flux-cored wire. Lianjie Li a, Chibin Gui a*. College of Ship & Power Engineering, Naval University of Engineering, Wuhan 430033, China. Abstract. The iron-matrix WC wearable composite reinforced with Tungsten Carbide (WC) particles was prepared by the method of flux-cored wire ...
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Tungsten | Plansee
Tungsten has the highest melting point of all the refractory metals, a low coefficient of thermal expansion and a relatively high density. Tungsten's good electrical conductivity and excellent thermal conductivity are further valuable properties. The values of all these properties are higher for tungsten than they are in the case of molybdenum.
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BEHAVIOR OF TUNGSTEN CARBIDE IN WATER STABILIZED …
Tungsten carbide WC is an important and irreplaceable material in applications like high speed cutting or high pressure forming. Its main disadvantages are complex phase behavior, decomposition to W2C at high temperatures, etc. Thus, tungsten carbide parts can be produced only by sintering with (mostly cobalt-based) binders; in this way, however,
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Interfacial thermal fatigue behavior of cast tungsten ...
However, most studies on cast tungsten carbide particle/steel matrix surface composites have focused on their wear performance [13, 23, 24], and little is known about their interfacial thermal fatigue behavior. The crack initiation and propagation behaviors at the IRZ of cast tungsten carbide particle/steel matrix surface composites are complex ...
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Interactions between hydrogen and tungsten carbide: a ...
addition, the behavior of hydrogen inside WC was investigated with rstprinciplesmethods,aimingatsheddinglighttofusion reactor design.10 For catalytic hydrogenation, formation of hydrogen tungsten bronzes, and HER with WC as an electrode, however, Hinteracts with WC on the surface. An understanding
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Micro Hardness and Erosive Wear Behavior of Tungsten ...
The current research work deals with the preparation of tungsten carbide nanoparticles incorporated epoxy polymer, and analyzing the Erosion wear behavior of these composites at different test conditions such as particle impingement angles and particle impingement velocities.
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Effect of sub‐layer temperature during HFCVD process on ...
Effect of sub-layer temperature during HFCVD process on morphology and corrosion behavior of tungsten carbide coating. Seyyed Hashem Mousavi Anijdan, Corresponding Author. [email protected]; ... (EIS) techniques were used to study the corrosion behavior of the coating in the solution of 1 mol/L H 2 SO 4. Results showed that the WC ...
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Electronic Structure and Catalytic Behavior of Tungsten ...
Tungsten carbide has been shown to be an effective catalyst for a number of reactions that are readily catalyzed by platinum, but not at all by tungsten, and it was speculated that this behavior is due to changes in the electron distribution when carbon is added to tungsten. A test of this hypothesis, made by measuring the valence band x-ray photoelectron spectrum of tungsten carbide and ...
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Tungsten vs Tungsten Carbide - differences in mechanical ...
Tungsten Carbide. Tungsten carbide is an alloy of tungsten and carbon, made by heating tungsten powder with carbon and hydrogen at 1,400 - 1,600°C (2,550 - 2,900°F). The resulting alloy is 2-3 times as rigid as steel and has a compressive strength surpassing all …
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Tungsten Carbide Material Safety Data Sheet by Federal Carbide
No data on the behavior of tungsten carbide in the environment are available. However, data for sodium tungstate and tungsten metal are expected to adequately capture the range of mobility of tungsten carbide in the environment. The adsorption/desorption is highly dependent on the characteristics of the soil system in question.
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Sub-micron binderless tungsten carbide sintering behavior ...
1. Introduction. Tungsten carbide (WC) is primarily cemented carbide and is widely used in industrial processing (such as wear resistant components, cutting tools and drilling tools) owing to its high hardness, high thermal and electrical conductivity, high melting temperature and high chemical stability, .In order to produce a fully dense tungsten carbide body and improve its mechanical ...
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Failure Behavior of Cemented Tungsten Carbide Materials: A ...
12%Many researchers have studied the wear and corrosion behavior of cemented tungsten carbide rock drill inserts to develop high-performance drill bits (Ref 2,3,4,5,6,9,11). A brief literature survey on the failure behavior of tungsten carbide materials is tabulated in Table 1, and found that the different modes of failure and the broad range of ...
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New Breakthrough of Tungsten Carbide with Superior ...
The heterogeneous strain response and plastic deformation behavior of tungsten carbide under the interaction of as prepared residual thermal stress and external stress in the bearing process are studied. The relationship between microstructure deformation behavior fracture toughness is revealed. This achievement was published in int. J ...
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Oxidation Behavior of Tungsten Carbide-6% Cobalt Cemented ...
12%This paper examines the oxidation behavior of annular tungsten carbide-6% cobalt binder samples, after exposure to air furnace temperatures in the range 500–1100 °C. An unreacted shrinking core model is supported by evidence of surface reactions on the OD surface. However, significant changes are noted on the ID surface of the annulus, indicating a change in …
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Sintering behaviour of binder less tungsten carbide ...
Pure tungsten carbide is a very hard and corrosion resistant material. Its various applications, such as wear parts, water-jet nozzles or pressing tools for forming glass lenses attract toolmakers ...
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Study of hardness and wear behavior of surface modified AA ...
Abstract : pThe aim of this work is to evaluate the role of tungsten carbide (WC) in increasing the hardness and improving the wear resistance of AA 7075 alloy.WC is reinforced into the surface of AA 7075 by using gas tungsten arc (GTA) as a heat source. Some of the GTA process parameters are maintained as constant, viz, contact-to-work distance and electrode tip angle, whereas the heat source ...
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Electrochemical machining of tungsten carbide | Request PDF
Schubert et al. [25] studied the anodic dissolution behavior of tungsten carbide in an alkaline electrolyte under electrochemical machining conditions and discovered that near the interface, an ...
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Tensile behavior of tungsten and tungsten-alloy wires from ...
The tensile behavior of a 200-micrometer-diameter tungsten lamp (218CS-W), tungsten + 1.0 atomic percent (a/o) thoria (ST300-W), and tungsten + 0.4 a/o hafnium carbide (WHfC) wires was determined over the temperature range 1300 t0 1600 K at strain rates of 3.3 X 10 to the -2 to 3.3 X 10 to the -5/sec. Although most tests were conducted on as-drawn materials, one series of tests was undertaken ...
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Friction and wear behavior of tungsten and titanium ...
WEAR ELSEVIER Wear 196 (1996) 156-163 Friction and wear behavior of tungsten and titanium carbide coatings S. Bahadur, Chien-Nan Yang Mechanical Engineering Deparlment, iowa State Univusily, Ames, 1,4 50011, USA Received 24 April 1995: accepted 27 November 1995 Abstract The sliding friction and wear behaviors of the detonation-gun sprayed (W,Ti)C-Ei and WC--Co ceramic …
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Effect of oxidation on thermal fatigue behavior of cast ...
Effect of oxidation on thermal fatigue behavior of cast tungsten carbide particle/steel substrate surface composite - Volume 34 Issue 10
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Tungsten carbide - Wikipedia
Tungsten carbide (chemical formula: WC) is a chemical compound (specifically, a carbide) containing equal parts of tungsten and carbon atoms. In its most basic form, tungsten carbide is a fine gray powder, but it can be pressed and formed into shapes through a process called sintering for use in industrial machinery, cutting tools, abrasives, armor-piercing shells and jewelry.
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Tungsten carbide nanoparticles as efficient cocatalysts ...
Tungsten carbide exhibits platinum-like behavior, which makes it an interesting potential substitute for noble metals in catalytic applications. Tungsten carbide nanocrystals (≈5 nm) are directly synthesized through the reaction of tungsten precursors with mesoporous graphitic C(3)N(4) (mpg-C(3)N(4) …
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Electronic Structure and Catalytic Behavior of Tungsten ...
Tungsten carbide has been found (1) to be an effective catalyst for a number of chemical reactions (particu-larly the isomerization of 2,2-dimethyl-propane) that are catalyzed readily by the scarce metal platinum, but not at all by tungsten. A growing body of ex-perimental data (2) indicates a close relationship between catalytic activity
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Toxicity of tungsten carbide and cobalt-doped tungsten ...
Background: Tungsten carbide nanoparticles are being explored for their use in the manufacture of hard metals. To develop nanoparticles for broad applications, potential risks to human health and the environment should be evaluated and taken into consideration.
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Decomposition Behavior of Tungsten Carbide in Cemented ...
Download Citation | Decomposition Behavior of Tungsten Carbide in Cemented Carbide Machined by EDM | Cemented carbides are composed of tungsten carbide and cobalt as …
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Interfacial thermal fatigue behavior of cast tungsten ...
Interfacial thermal fatigue behavior of cast tungsten carbide particle/steel matrix surface composites - Volume 34 Issue 22
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