Structure Formation of Polycarbide-Based TiC-VC(NbC)-WC/nano WC Hard Alloys
Abstract
The process of structure formation in the alloys of the system TiC-VC(NbC)-NiCr with the alloying additions of the fine or nano WC, depending on the chemical composition and sintering temperature using the optical microscopy, SEM and XRD analysis, is investigated in this paper. The core/rim structure alloys were found irrespective of the amount of tungsten carbide additions. The research suggests that the adding of nano WC causes decrease in carbide grains, redistribution of the elements in the core and rim, and decrease in sintering temperature by 50–100 °С.
Tika pētīts struktūru veidošanas process sakausējumos TiC-VC(NbC)-NiCr ar smalku vai nano WC sakausējuma papildinājumiem atkarībā no ķīmiskā sastāva un saķepināšanas temperatūras, izmantojot optisko mikroskopiju, SEM un XRD analīzi. Centru/aptvērumu struktūras sakausējumi tika konstatēti neatkarīgi no volframa karbīda piedevu daudzuma. Pētījums liecina, ka nano WC pievienošana samazina karbīda graudus, elementu pārdali centros un aptvērumos, kā arī notiek saķepināšanās temperatūras samazināšanās par 50–100° С.
Keywords: |
Alloying; core; hard alloys; inner rim; microstructure; nano additions; outer rim; titanium carbide; tungsten carbide
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References
V. I. Tretyakov, “To the history of hard alloys,” Instrumental Word, no 3, pp. 15–17, 1998.
V. S. Panov and А. М. Chuvilin, Technology and properties of sintered hard alloys and their products. М.: MISiS, 2001, 428 p.
L. G. Bodrova and G. M. Kramar, “The microstructure of titanium and vanadium carbide based hard alloys,” in Advances in Hard Materials Production Proc. of European Conf., Turin, Italy, 1999. pp. 269–276.
L. Bodrova, V. Lazaryuk and H. Kramar, “Properties and composition of the TiC-NbC based cemented carbides,” in Proc. of the Powder Metallurgy World Congr., Granada, Spain, 1998, pp. 105–109.
С. J. Choi, В. G. Moon and W. W. Park, “Synthesis of TiC-Ni(-Mo) Cermet via Mechanical alloying,” in Proc. of 1998 Powder Metallurgy World Congr. and Exhibition, Granada, Spain, 1988, vol. 4, pp. 45–50.
Ye. S. Gevorkyan, Yu. G.Gutsalenko and M. M. Prokopiv, “Effect of nanoscale particles on the properties of tungsten monocarbide carbide cutting materials,” Sat scientific works Ukrainian Research Institute of Refractories named after A.S. Berezhnoy, JSC, Harkiv: Caravella, 2010, no 110, pp. 313–318.
S.Yu. Marinenko, L.G. Bodrova, G.M. Kramar and V.V. Lazaryuk, “Special features of structure formation in polycarbide based hard alloys,” J. of Superhard Materials, vol. 31, no. 2, pp. 89–96, Apr. 2009. https://doi.org/10.3103/s1063457609020051.
Ji Xiong, Zhixing Guo, Baoluo Shen and Ding Cao, “The effect of Mo2C, WC and TaC on the microstructure and properties of ultra-fine TiC0.7N0.3 cerme,” Materials & Design, vol. 28, no 5, pp. 1689–1694, Jan. 2007. https://doi.org/10.1016/j.matdes.2006.03.005.
Yan Li, Ning Liu, Xiaobo Zhang and Chunlan Rong, “Effect of WC content on the microstructure and mechanical properties of (Ti,W)(C,N) Co cermets,” Int. J. of Refractory Metals & Hard Materials, vol. 26, no 1, pp. 33–40, Jan 2008. https://doi.org/10.1016/j.ijrmhm.2007.01.003
I.V. Koval, L.G. Bodrova, H.М. Kramar, S.Yu. Marynenko and Ya.О. Kovalchuk, “Investigation of the polycarbide hard alloys fracture nature under thermocyclic loadings,” Intercollegiate collection “Scientific notes”, no 59, pp. 144–148, 2017.
S.Yu. Marynenko, H.М. Kramar and L.G. Bodrova, “Tribotechnical properties of hard alloys on a polycarbide base,” in Collection of scientific works of the XI Intern. Conf. “Tribology and Reliability”, St. Petersburg: PSTU, 2011, pp. 150–156.
S.Yu. Marynenko, H.М. Kramar, L.G. Bodrova et al., “Features of wear of hard alloys (Ті, V, Nb, W)C-NiCr in the process of cutting,” Announcer ТSТU, vol. 14, no 4, pp. 27–32, 2009.
L.G. Bodrova, H.М. Kramar, S.Yu. Marynenko et al., “New tungsten free hard alloys with higher exploitation properties,” Instrumental word, vol. 1, no 2, pp. 54–56, 2011.
P. Villars and K. Cenzual Eds., “Pearson’s Crystal Data,” in Crystal Structure Database for Inorganic Compounds, Release 2015/16, ASM International, Materials Park, Ohio, USA.
R.A. Young, Eds., The Rietveld Method, Oxford, United Kingdom: Oxford University Press, 1995.
R.A. Young, A. Sakthivel, T.S. Moss and C.O. Paiva-Santos, “DBWS 9411 – an upgrade of the DBWS*.* programs for Rietveld refinement with PC and mainframe computers,” J. of Applied Crystallography, vol. 28, no 3, pp. 366 367, Jun. 1995, https://doi.org/10.1107/s0021889895002160
V. A. Zhilyaev and E. I. Patrakov, “Influence of the methods of obtaining TiC-Ni-Mo alloy on the peculiarities of the formation of its composition and microstructure,” Powder Metallurgy and Metal Ceramics, vol. 28, no 8, pp. 626–632, Aug. 1989, https://doi.org/10.1007/bf00794579
DOI: 10.7250/bfpcs.2018.005
Cited-By
1. Structure Formation of Polycarbide-Based TiC-VC(NbC)-WC/nano WC Hard Alloys
Liudmyla Bodrova, Halyna Kramar, Yaroslav Kovalchuk, Sergiy Marynenko, Ihor Koval
Boundary Field Problems and Computer Simulation vol: 57 first page: 35 year: 2019
doi: 10.7250/bfpcs.2018.005
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