Peculiarities of production and properties of WC + 20 mass% Ni hard alloy with ultra-coarse-grained microstructure

Keywords

tungsten carbide, cemented carbide WC + 20 mass% Ni, ultra-coarse-grained microstructure, strength, hardness, deformation, plasticity.

Cite as

Matviichuk O. O., Andreiev I. V., Litoshenko N. V., Tsysar M. O., Vynar V. A., Hnatenko I. O., Davydenko S. A., and Savchuk I. V. Peculiarities of production and properties of WC + 20 mass% Ni hard alloy with ultra-coarse-grained microstructure. Physicochemical Mechanics of Materials. 2023. 59(3), 108-115.

https://doi.org/10.15407/pcmm2023.03.108

Abstract

The influence of the initial components mixing conditions and sintering temperatures on the peculiarities of microstructure of the cemented carbide WC + 20 mass% Ni made from ultra-coarse-grained (80/40 mm) tungsten carbide particles is investigated. It is established by the metallographic analysis that for the formation of such microstructure of a hard alloy, it is sufficient to use liquid phase sintering and preliminary economical wet mixing of WC with Ni powder. The strength under the conditions of bending and compression is 1530 and 1720 MPa, respectively, the density is 13.51 g/cm³, and the hardness is 76 HRA. For the first time, the compressive load-strain curve for the WC + 20 mass% Ni alloy with the average carbide grain size of 20 mm is experimentally obtained. It is found that its plasticity is 6 times higher than that of alloys produced under other technological modes.

References

1. V. A. Falkovsky, and L. I. Kliachko, Hard Alloys [in Russian], “Ruda I Metally” Publ. House, Moscow (2005).
2. N. V. Novikov (Ed.), Modern Hardmetals: Collection of Sci. Papers [in Russian], Bakul Institute for Superhard Materials, Kyiv (2008).
3. L. Prakash, “Fundamentals and General Applications of Hardmetals,” Comprehensive Hard Materials, 1, 29-90 (2014). https://doi.org/10.1016/B978-0-08-096527-7.00002-7
4. A. M. Isonkin, and A. A. Matveichuk, “The use of gas-phase carbidization of tungsten carbide to increase the wear resistance of diamond-containing materials of rock-crushing tools”, in: Forum Girnykiv-2015: Math. Inter, Conf., Nat. Mining Univ., Dnipropetrovsk (2015), pp. 70-67.
5. I. Konyashin, “Approaching the 100th anniversary of the Hardmetal invention: From first WC-Co samples towards modern advanced Hardmetal grades,” Int. J. of Refractory Metals and Hard Mater., 111, art. no. 106113 (2023). https://doi.org/10.1016/j.ijrmhm.2023.106113
6. N. V. Litoshenko, “Dependence of the strength and plasticity of WC-6Co medium-grained hard alloys on deformation characteristics of the cobalt and carbide phases,” J. Superhard Mater., 34, Is. 4, 243-247 (2012). https://doi.org/10.3103/S1063457612040053
7. V. P. Bondarenko, and É. G. Pavlotskaya, “High-temperature synthesis of tungsten carbide in a methane-hydrogen gas medium,” Powder Metall. Met. Ceram., 34, 508-512 (1996). https://doi.org/10.1007/BF00559958
8. X. Zhongnan, Z. Li, H. Nie, F. Chang, and P. Dai, “Effect of crystallinity of WC on microstructure, properties, and application of WC-Co cemented carbide,” J. Superhard Mater., 43, Is. 1, 21-30 (2021). https://doi.org/10.3103/S106345762101007X
9. E. Lassner, and W. D. Schubert, Tungsten: Properties, Chemistry, Technology of the Element, Alloys, and Chemical Compounds. Kluwer Academic/Plenum Publ., New York (1999). https://doi.org/10.1007/978-1-4615-4907-9
10. I. V. Andreiev, O. O. Matviichuk, N. V. Lytoshenko, I. O. Hnatenko, and O. V. Ievdokymova, “Microstructure and properties of porous skeletan composites based on ultra-coarse-grained tungsten carbide with metal coating,” J. Superhard Mater., 44, Is. 4, 266-275 (2022). https://doi.org/10.3103/S1063457622040025
11. N. V. Lytoshenko, I. V. Andreiev, and O. O. Matviichuk, “Mathematical modeling of strength and plasticity of high-modular skeletal composites obtained by impregnation method,” in: 8th Int. Samsonov Conf. “Materials Science of Refractory Compounds” (Kyiv, May 24-27, 2022, Kyiv, Ukraine), Kyiv (2022), p. 17.
12. X. Deng, B. R. Patterson, K. K. Chawla, M. C. Koopman, Z. Fang, G. Lockwood, and A. Griffo, “Mechanical properties of a hybrid cemented carbide composite,” Int. J. of Refractory Metals and Hard Mater., 19, Iss. 4-6, 547-552 (2001). https://doi.org/10.1016/S0263-4368(01)00060-9
13. A. G. P. da Silva, W. D. Schubert, and B. Lux, “The role of the binder phase in the WC-Co,” Sintering Mater. Res., 4, Is. 2, 59-62 (2001). https://doi.org/10.1590/S1516-14392001000200003
14. V. P. Bondarenko, I. V. Andreyev, I. V. Savchuk, O. O. Matviichuk, O. V. Ievdokymova, and A. V. Galkov, “Recent researches on the metal-ceramic composites based on the decamicron-grained WC,” Int. J. of Refractory Metals and Hard Mater., 39, 18-31 (2013). https://doi.org/10.1016/j.ijrmhm.2013.01.018
15. N. J. Roduit, MicroVision: Image analysis toolbox for measuring and quantifying components of high-definition images. Ver. 1.3.4.
16. O. I. Fomina, S. N. Suvorova, and Ya. M. Turetsky, Powder Metallurgy. Encyclopedia of International Standards [in Russian], Publ. House of Standards, Moscow (1999).
17. N. V. Litoshenko, “Assessment of conventional elastic limit for a hard WC-Co alloy in tension,” Strength of Mater., 31, Is. 6, 611-615 (1999). https://doi.org/10.1007/BF02510897
18. V. T. Golovchan, and N. V. Litoshenko, “The stress-strain behavior of WC-Co hardmetals,” Comp. Mater. Sci., 49, Is. 3, 593-597 (2010). https://doi.org/10.1016/j.commatsci.2010.05.055
19. V. T. Golovchan, “Some analytical consequences of experimental data of properties of WC-Co hardmetals,” Int. J. of Refractory Metals and Hard Mater., 26, Is. 4, 301-305 (2008). https://doi.org/10.1016/j.ijrmhm.2007.07.001
20. V. P. Bondarenko, and N. V. Litoshenko, “Residual thermal stresses in a three-phase cermet composite with a layer-structured refractory component,” J. of Superhard Mater., 41, Is. 5, 364-368 (2019). https://doi.org/10.3103/S1063457619050095
21. A. F. Lisovsky, Formation of the Structure of Composite Materials During Processing with Metal Melts [in Russian], Naukova Dumka, Kyiv (2008).
22. N. V. Novikov, and L. N. Devin, “Plastic deformation of the crack tip in failure of tungsten-cobalt hard alloys,” Sov. Mater. Sci., 27, No. 4, 397-401 (1992). https://doi.org/10.1007/BF00723232