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Information × Registration Number 0225U001803, (0122U000396) , R & D reports Title Influence of barothermal treatment (NRT) on the transformation of the structural state of sintered hard alloys based on WC carbide popup.stage_title Вплив баротермічної обробки (НРНТ) на трансформацію структурного стану спечених твердих сплавів на основі карбіду WC Head Andreiev Ihor V., Кандидат технічних наук Registration Date 08-02-2025 Organization V. Bakul Institute of superhard material of the National Academy of Sciences of Ukraine popup.description1 Investigate changes in the structural and phase state of carbide products in order to model the work of carbide structural elements of high pressure equipment. popup.description2  The positive effect of НРНТ treatment on the structure and properties of WC-6Me hard alloys has been established. It has been determined that at temperatures lower than the sintering temperature and under pressures up to 8 GPa, the grain size of the alloys remains constant, grain growth is almost absent, and can fluctuate within the type of alloy (for medium-grained alloys of up to 3 μm). At the same time, the periods of the crystal lattice of WC carbides decrease, the more intense the higher the pressure and the lower the temperature. The material also undergoes hardening, its hardness increases to 1 HRA and the stress intensity factor increases to 20%. The stress state of the sintered and treated samples changes from compressed (after sintering) to tensile (due to the action of pressure and temperature). Macrostresses for WC-6(Co+Ni) alloys vary from -195 MPa (normal sintering) to +106 MPa (HPHT). The efficiency of the materials increases: in rock-breaking tools up to 30% (WC-6Me alloy) and up to 50% in deformation tools (WC-15Me alloy). Product Description popup.authors Ilkova Valentyna A. Bilorusets Viktor V. Borymskyi Oleksandr I. Buslenko Raisa O. Vasylchuk Oleksandr S. Hnatenko Iryna O. Davydenko Snizhana A. Zisman Oleksandr H. Zabolotnyi Serhii D. Kosenchuk Tamara O. Leonov Yevhen M. Lysovenko Serhii O. Lytoshenko Nataliia V. Lopatiuk Oleh V. Malanchuk Varvara V. Matvijchuk Oleksandr O. Osipov Oleksandr S. Savchuk Iryna V. Smirnova Anzhela V. Stepanenko Inesa A. Studenets Serhii F. Tsysar Maksym O. Cherniienko Oleksandr I. Sheremet Vitalii I. Yurchuk Mykola O. popup.nrat_date 2025-02-08 Close