Search Results

1 - 10 of 26 items :

  • "tungsten carbides" x
Clear All
Mechanical and thermal properties of tungsten carbide – graphite nanoparticles nanocomposites

LITERUTRE CITED 1. Toth, LE. Transition metal carbides and nitrides. New York: Academic Press; 1971. 2. Gubernat, A. & Stobierski, L. (2009). Węgliki metalopodobne Cz. I. Badania nad spiekaniem. Cer. Mat. 61(2), 113–118 from PTCer database on the World Wide Web: http://ptcer.pl/mccm/pl/szczegoly-artykulu/61/2/139 3. Cha, S.I. & Hong, S.H. (2003). Microstructures of binderless tungsten carbides sintered by spark plasma sintering process. Mater. Sci. Eng. A 356(1), 381–389. DOI: 10.1016/S0921-5093(03)00151-5. 4. Zhao, J., Holland, T

Open access
The evaluation of wear of tungsten carbide dental bur

Reference A hmed , W. et al . 2014. Dental Tools, Human Tooth and Environment , Chemical Vapour Deposition of Diamond for Dental Tools and Burs. SpringerBriefs in Materials, Springer International Publishing, 19-49. A hmed , W., S ein , H., J ackson , M., P olini , R. 2004. Chemical vapour deposition of diamond films onto tungsten carbide dental burs , Tribology International, 37, 957-964, DOI: 10.1016/j.triboint.2004.07.013 A li , N., C abral , G., L opes , A.B., G racio , J. 2004. Time-modulated CVD on 0.8 mm-WC–10%-Co hardmetals: study on

Open access
Synthesis and characterization of nanostructured molybdenum & tungsten carbide materials, and study of diffusion model

Nanoparticles via a Simple "Urea Glass" Route, Nano Lett. , 8, 4659-4663. DOI: 10.1021/nl8018593. Patel, M. & Subrahmanyam, J., (2008). Synthesis of nanocrystalline molybdenum carbide (Mo 2 C) by solution route, Mater. Res. Bull., 43, 2036-2041. DOI:10.1016/j.mater-resbull.2007.09.025. Keller, N., Pietruszka, B. & Keller, V. (2006). A new one-dimensional tungsten carbide nanostructured material, Mater. Lett. , 60, 1774-1777. DOI:10.1016/j.matlet.2005.12.017. Singh, R. P., (2008). Synthesis and

Open access
Determination of emissivity coefficient of heat-resistant super alloys and cemented carbide

Abstract

This paper presents the analysis of emissivity engineering materials according to temperature. Experiment is concerned on difficult to machine materials, which may be turned with laser assisting. Cylindrical samples made of nickel-based alloys Inconel 625, Inconel 718, Waspaloy and tungsten-carbides based on cobalt matrix were analyzed. The samples’ temperature in contact method was compared to the temperature measured by non-contact pyrometers. Based on this relative, the value of the emissivity coefficient was adjusted to the right indication of pyrometers.

Open access
Study of the Influence of Cutting Regime Parameters on Grinding Forces in Processing Tungsten Carbide Dk460uf

Abstract

This paper presents a study on grinding tungsten carbide DK460UF, through experimental investigation using diamond grinding wheel with 54 μm grain size. Different sets of experiments were performed to study the effects of the independent grinding parameters such as grinding wheel speed, feed and depth of cut on cutting forces. Test results showed that the feed and depth of cut influence significantly the cutting forces. The research was lead to optimize the process parameters for reducing cutting forces. In this way, for different parameters of cutting regime, it were measured the values of the components of the grinding force, tangential component, Ft and normal component Fn. The results of the experiment showed that it is better to use great speeds and small feed rate and depth of cut in grinding tungsten carbides, such as DK460UF

Open access
Microstructure and Mechanical Properties of Ni-WC Thermal Sprayed Composite Coatings

REFERENCES 1. Berger L.M., Application of hardmetals as thermal spray coatings. International Journal of Refractory Metals & Hard Materials 49 (2015) 350–364. 2. Krishna B.V., Misra V.N., Mukherjee P.S., Sharma P., Microstructure and properties of flame sprayed tungsten carbide coatings. International Journal of Refractory Metals & Hard Materials 20 (2002) 355–374. 3. Matikainen V., Bolelli G., Koivuluoto H., Sassatelli P., Lusvarghi L., Vuoristo P., Sliding wear behaviour of HVOF and HVAF sprayed Cr 3 C 2 -based coatings. Wear 388–389 (2017) 57

Open access
Effect of hammer peening with tungsten coating on fatigue properties of carbon steel under rotating bending

Design 2010, 31, 3299-3307 7. N. A. Ozbek et.al.: Effect of cutting conditions on wear performance of cryogenically treated tungsten carbide inserts in the dry turning of stainless steel. Tribology International 2016, 94, 223-233. 8. J. Berg and N. Stranghoener: Fatigue strength of welded ultra high strength steels improved by high-frequency hammer peening. Procedia Materials Science 2014, 3, 71-76. 9. C. Revilla-Gomeza and J-Y. Buffierea: Assessment of the surface hardening effects from hammer peening on high strength

Open access
Determination of selected properties and fracture toughness of HVOF coatings

Abstract

The article is aimed at evaluation of chosen properties of thermally sprayed coatings based on tungsten carbide. It was evaluated two types of coatings – WC-FeCrAl and WC-WB-Co. The coatings were deposited on basic material steel AISI 316L. The aim of experimental works was to determine the quality and resistance of coatings in corrosion environment depending on number of thermal cycles. The quality of coatings was evaluated by determination of their adhesion depending on thermal cycles, determination of microhardness and indentation fracture toughness. Coatings were exposed in tribo-corrosion conditions with the presence of 1% NaCl. The results of experimental showed a higher quality of coating WC-WB-Co.

Open access
Diffusion bonding of electroless Ni plated WC composite to Cu and AISI 316 stainless steel

Abstract

In this study, a composite containing WC (Tungsten Carbide) and Ni was produced by two different processing routes. Electroless Ni coated WC powders were consolidated and sintered at 1200 °C. Diffusion bonding couples of WC(Ni)-electrolytic Cu, WC(Ni)-AISI 316 stainless steel and WC(Ni)-WC(Ni) were manufactured by using a preloaded compression system under Ar atmosphere. Diffusion bonding was carried out at varying bonding temperatures; 750 °C for (WC)Ni-Cu diffusion couple and 1200 °C for (WC)Ni-(WC)Ni and (WC)Ni-AISI 316 stainless steel diffusion couples. Standard metallographic techniques, Scanning Electron Microscopy and a shear test were employed to characterize the microstructure of bondline and mechanical properties of each diffusion couple, respectively.

Open access
Considerations on Dop (Depth Of Penetration) Test for Evaluation of Ceramics Materials Used in Ballistic Protection

Materials to Penetration by a Tungsten Carbide Core Projectile, Armor System Symposium, Tennessee, USA 2005. [5] Murat Vural, Ballistic Performance of Alumina Ceramic Armors, Proceedings of the Ceramic Armour Materials by Design Symposium, Hawaii 2001. [6] S.M. Walley. Historical review of high strain rate and shock properties of ceramics relevant to their application in armour. Advances in Applied Ceramics DOI 10.1179/174367609X422180.

Open access