Formation of Fe-Cu-Ni-Sn-VN Nanocrystalline Matrix by Vacuum Hot Pressing for Diamond-Containing Composite. Mechanical and Tribological Properties

Мечник, В. А.; Бондаренко, Н. А.; Kolodnitskyi, V. M.; Закиев, В. И.; Закиев, И. М.; Игнатович, С. Р.; Дуб, С. Н.; Kuzin, Nykolai O.

doi:10.3103/s1063457619060030

Cited by 23 publications

(4 citation statements)

References 41 publications

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“…In [45] it was indicated that the mechanical properties of fine-grained diamond composite materials based on Fe-Cu matrix are higher than those of their coarsegrained counterparts. In the present researches, H and E values for sintered samples (see Table 2) significantly exceed H = 5.37 GPa and E = 125 GPa values of 51Fe-32Cu-9Ni-8Sn matrix material sample containing 3 wt.% of nano-VN reinforcement, formed under similar conditions [46]. Moreover, the hardness H = 5.2 GPa and elastic modulus E = 197 GPa, as well as the values of ration H/E = 0.0264 and index H 3 /E 2 = 3.62 MPa of the sample 1 (see Table 2) significantly exceeded the previously reported values H = 2.68 GPa, E = 125 GPa, H/E = 0.013, and H 3 /E 2 = 0.49 MPa of a similar sample sintered at temperature 800 • C with the subsequent hot post-pressing under the pressure of 160 MPa [36].…”

Section: Sample Nosupporting

confidence: 50%

Properties of Cutting Tool Composite Material Diamond–(Fe–Ni–Cu–Sn) Reinforced with Nano-VN

Mamalis¹,

Мечник

Morozow

et al. 2022

Machines

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The study is devoted to structure and mechanical properties of a diamond composite used for manufacturing of cutting tools applied in a wide range of technological fields. The sample tools were fabricated by cold-pressing technology followed by hot-pressing in vacuum of the 51Fe–32Cu–9Ni–8Sn matrix mixture with diamond bits, both in absence and presence of nano-VN additives. It was demonstrated that without VN addition, the diamond–matrix interface contained voids and discontinuities. Nanodispersed VN added to the matrix resulted in the formation of a more fine-grained structure consisting of solid solutions composed of iron, copper, nickel, vanadium and tin in different ratios and the formation of a tight diamond–matrix zone with no visible voids, discontinuities and other defects. Optimal concentrations of VN in the CDM matrix were found achieving the maximum values of nanohardness H = 7.8 GPa, elastic modulus E = 213 GPa, resistance to elastic deformation expressed by ratio H/E = 0.0366, plastic deformation resistance H3/E2 = 10.46 MPa, ultimate flexural strength Rbm = 1110 MPa, and compressive strength Rcm = 1410 MPa. As-prepared Fe–Cu–Ni–Sn–VN composites with enhanced physical and mechanical properties are suitable for cutting tools of increased durability and improved performance.

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Section: Sample Nosupporting

confidence: 50%

Properties of Cutting Tool Composite Material Diamond–(Fe–Ni–Cu–Sn) Reinforced with Nano-VN

Mamalis¹,

Мечник

Morozow

et al. 2022

Machines

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“…Decrease of the modulus E caused by the additions CrB 2 and VN took place due to the microstructure refinement. It was suggested elsewhere [45] that this phenomenon was promoted by the phase transformation α→γ→α. Subsequent increase of the indexes Н/Е, Н 3 /Е 2 , 1/(Е 2 Н) is advantageous for the MMCs reinforced with diamonds for tool applications.…”

Section: Mechanical Propertiesmentioning

confidence: 85%

Combined Effect of CrB<sub>2</sub> Micropowder and VN Nanopowder on the Strength and Wear Re-sistance of Fe‒Cu–Ni–Sn Matrix Diamond Composites

Ratov¹,

Мечник²,

Rucki³

et al. 2023

Adv. Sci. Technol. Res. J.

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The paper presents research results on the enhancement of diamond composites designed for tools application for mining industry, hard rocks cutting, able to withstand harsh conditions under heavy dynamical loads. In the present study, both CrB 2 micropowder and VN nanopowder additives were used in proportions up to 5 wt.% and 6 wt.%, respectively, together with the basic matrix composition of 51 wt.% Fe, 32 wt.% Cu, 9 wt.% Ni, and 8 wt.% Sn. Addition of both components, CrB 2 and VN, appeared to be advantageous in proportion of 2 wt.% and 4 wt.%, respectively. This composition exhibited the highest relative density of 0.9968, better than that without additives. Similarly, the highest values of compressive strength R cm and flexural strength R bm were reached for the composite with the same percentage of CrB 2 and VN. Compared to the composite with no addition of CrB 2 and VN, R cm improved by almost 70%, while R bm by 81%. Additionally, the abovementioned additives enhanced the ability of the matrix to prevent the diamond reinforcement from being torn out of the composite, which is very important under harsh working conditions of the cutting tools. The presence of CrB 2 micropowder and VN nanopowder promoted densification of the matrix and adhesion between the diamond grits and the Fe-Cu-Ni-Sn matrix.

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“…Многослойная алмазная коронка (рисунок 3) имеет сложную криволинейную форму алмазных импрегнированных слоев, каждый которых по мере износа предыдущего слоя вступает в контакт с породой для ее разрушения. Поэтому создание такой коронки невозможно без современного программного обеспечения [10][11][12][13][14][15][16][17][18][19][20].…”

Section: бурениеunclassified

Scientific Foundations of the Creation of Diamond Drilling Tools of the Ring Type

RATOV¹,

FEDOROV²,

KUTTYBAYEV³

et al. 2022

NiG

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To solve the mentioned problem of accelerated commissioning of minerals occurring in hard rocks, studies have been carried out to formulate the following recommendations for the creation of high-performance diamond bits: - the crown matrix should contain several (five or more) impregnated diamond-bearing layers in height, separated by diamond-free layers of significantly lower hardness (for example, VK-20 hard alloy); - each diamond impregnated layer of the matrix must have a "comb" profile, representing annular wedge-shaped protrusions and depressions; - the impregnated diamond layers of the matrix during drilling should be equally loaded along the radius of the bit, which makes it possible to increase the wear resistance of the tool and reduce the number of rough diamonds for the manufacture of the latter; - to maintain the diameters of the well and the drilled core, the inner and outer side surfaces of the matrix must be equipped with wear-resistant diamond inserts (for example, from tvesala); - to produce a high-quality wear-resistant matrix, small amounts of various components should be added to the composition of the binder of the 94WC + Co + Cu type diamond grains. Recommendations 1-4 are embodied in the design of diamond impregnated crowns, for which the Republic of Kazakhstan has received patents. Crowns have been introduced into production with a significant effect. A diamond crown has been developed and patented, the impregnated layers placed in a matrix on a three-start helical surface with a slight pitch of 0.8 - 1.2 mm. It is expected that with this design, the pre-fracture zone will be involved in the bottom hole destruction process, which lies under the intrusion zone and represents a hard rock broken and weakened by cracks to a depth ten times greater than the intrusion depth of diamond grains. An experimental batch of multilayer crowns with an equally loaded comb profile and placement of impregnated layers on a three-start helical surface was made using software and CNC (numerical control) machines.

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Formation of Fe-Cu-Ni-Sn-VN Nanocrystalline Matrix by Vacuum Hot Pressing for Diamond-Containing Composite. Mechanical and Tribological Properties

Cited by 23 publications

References 41 publications

Properties of Cutting Tool Composite Material Diamond–(Fe–Ni–Cu–Sn) Reinforced with Nano-VN

Properties of Cutting Tool Composite Material Diamond–(Fe–Ni–Cu–Sn) Reinforced with Nano-VN

Combined Effect of CrB<sub>2</sub> Micropowder and VN Nanopowder on the Strength and Wear Re-sistance of Fe‒Cu–Ni–Sn Matrix Diamond Composites

Scientific Foundations of the Creation of Diamond Drilling Tools of the Ring Type

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