- 1. Improvement of the methodology for calculating the expected drilling speed with PDC chisels
- (Content №1 2024)
- ... The patterns of destruction by the proposed diamond-hard-alloy PDC chisel of a rock mass at the bottom of the well from the parameters of the drilling regime and the hardness of the drilled rocks have ...
- Created on 29 February 2024
- 2. Designing the working surfaces of rotary planetary mechanisms
- (Content №4 2023)
- ... 2. Yang, Y., Tang, J., Chen, G., Yang, Y., & Cao, D. (2021). Rub-Impact Investigation of a Single-Rotor System Considering Coating Effect and Coating Hardness. Journal of Vibration Engineering Technologies, ...
- Created on 28 August 2023
- 3. Application of the stereomicrophotogrammetric method for the complex study of the Al-Cu-Mg alloys system
- (Content №4 2023)
- ... X-ray spectroscopy (EDX analysis). Findings. Our experiments have shown that with an increase in the time of natural aging, the hardness increases slowly and reaches a maximum hardness of 127 Hv30 after ...
- Created on 28 August 2023
- 4. Lubricants for rail transport liquid (plastic) for friction pair “wheel – rail”
- (Content №1 2022)
- ... 1.Vorobyov, A.A., Bunkova, T.G., & Sobolev, A.A. (2019). To the question of the optimal ratio of the hardness of the wheel-rail pair. Proceedings of PGUPS, 2019/1. 77-86. Retrieved from https://cyberleninka.ru/article/n/k-voprosu-ob-optimalnom-sootnoshenii-tverdosti-pary-koleso-rels/viewer. ...
- Created on 25 February 2022
- 5. Definition of rational operating modes of a vibratory jaw crusher
- (Content №4 2021)
- ... vibratory jaw crusher makes it possible to determine the optimal level of power consumed by the crusher and efficiency in processing materials of different hardness. Keywords: vibratory jaw crusher, elasticity ...
- Created on 23 August 2021
- 6. Electric arc spraying of cermet coatings of steel 65G-Tic system
- (Content №2 2021)
- ... a ZEISS Gemini SEM 500 scanning electron microscope. The chemical composition was determined by X-ray spectral analysis; phases were identified by measuring their microhardness on a PMT-3 device. The bond ...
- Created on 29 April 2021
- 7. Determining the parameters of a natural arch while forming support load of a horizontal roadways
- (Content №2 2021)
- ... identify rock pressure on the support of underground mine roadways as well as substantiation of its efficient use area taking into consideration the depth of the mine roadway, its geometry, and hardness ...
- Created on 29 April 2021
- 8. Mathematical modeling of the surface roughness of the grinding wheel during straightening
- (Content №1 2021)
- ... Proceedings, 18, 2840-2847. https://doi.org/10.1016/j.matpr.2019.07.151. 5. Shi, X., & Xiu, S. (2020). Study on the hardness model of grinding for structural steel. The International Journal of Advanced ...
- Created on 05 March 2021
- 9. Effect of alloying heat-resistant packing coatings on their tribotechnical, physical and mechanical properties
- (Content №6 2020)
- ... and microhardness to ensure predictable performance properties at the temperatures of about 1100 C. Methodology. The friction coefficient and the energy rate of wear were determined regarding the results ...
- Created on 22 December 2020
- 10. The study of the particular aspects of water purification from the heavy metal ions using the method of nanofiltration
- (Contens №4 2020)
- ... of complexoneswas was established. It is shown that the hardness ions, hydrocarbons, chlorides, sulfates reduce the selectivity of the nanofiltration membrane to heavy metal ions, so it is proposed to ...
- Created on 30 August 2020
- 11. Development and research of thеrmоplаstiс methods for hardening details
- (Contens №2 2020)
- ... Methodology. Experimental studies on the influence of the temperature factor on the hardening process were carried out at a specialized facility developed at the Department of Engineering and Woodworking Technology of CNUT (Chernihiv National University of Technology). The three-roller pneumatic device was mounted on a support of the lathe-screw machine model 1K62. Workpieces were mounted on a special mandrel in a three-jaw chuck. The spindle speed was set using an electronic tachometer; the pressure on the rollers was recorded by a pressure gauge. Before the rolling, the workpiece was kept in a laboratory electric furnace, the preheat temperature was recorded by a logometer. Since the surface quality of surface plastic deformation (SPD) treatment with heating depends on a large number of factors, a central second-order rotatable composite layout was used to obtain the multifactor model. On the basis of a priori information and the results of the previous experiments, the feed (S, mm/rev), pressure (P, H) and preheat temperature (T, °C) were taken as factors determining the process. The surface layer hardness was taken as the initial parameter. ...
- Created on 10 May 2020
- 12. Impact of flexibility of support on gear mesh dynamics
- (Geotechnical and Mining Mechanical Engineering, Machine Building)
- ... of reducing vibroactivity of existing mills due to lubrication and increasing hardness of working face of gear teeth are defined. Originality. Methods for defining resonance range of gear mesh which ...
- Created on 19 August 2019
- 13. Investigation into crown stability at underground leaching of uranium ores
- (Mining)
- ... of uranium ores on their hardness for the purposes of determining safe crown parameters. Findings. The dependencies of the ore body dip angle impact and the degree of crown disturbances caused ...
- Created on 26 December 2018
- 14. Vibrational-centrifugal surface strengthening of drill and casing pipes
- (Geotechnical and mining mechanical engineering, machine building)
- ... enhanced micro-hardness. Due to technological use of considerable inertial forces of massive strengtheners, which are rolled over the surface during the strengthening process, effective reinforcement of ...
- Created on 29 October 2018
- 15. Creation of effective metallic thermal insulation constructions
- (Geotechnical and mining mechanical engineering, machine building)
- ... for their use as elements of power equipment thermal protection, were determined. The thermal conductivity coefficient and hardness factor of the obtained material were found. Practical value. A thermal ...
- Created on 11 January 2018
- 16. Perspectives of improving physical and mechanical properties of thermal coatings by electropulse exposure
- (Geotechnical and mining mechanical engineering, machine building)
- ... treatment (PHT). Methodology.Study of porous electric arc and plasma sprayed coating was carried out using a computer metallography. Vickers hardness was determined. The study of thermal properties ...
- Created on 16 March 2017
- 17. Strength properties of carbon steel of railway wheel after the speed-up cooling
- (Geotechnical and mining mechanical engineering, machine building)
- ... yield stresses of carbon steel were determined under tension. Speed of deformation at mechanical tests was 10-3 s-1. The microhardness of structural constituents of steel was estimated using the apparatus ...
- Created on 17 November 2016
- 18. Anticorrosion and strengthening coatings for mining equipment
- (Geotechnical and mining mechanical engineering, machine building)
- ... analysis of the elemental composition of composite cathodes was held with the JEOL JSM-5910 electron microscope. To measure the microhardness the HVS-1000A micro durometer was used. Determination of corrosion ...
- Created on 22 June 2016
- 19. INFLUENCE OF HETEROGENEOUS CRYSTALLIZATION CONDITIONS OF ALUMINUM ALLOY ON ITS PLASTIC PROPERTIES
- (Solid-state physics, mineral processing)
- ... in the alloy under study, we employed the photoelectric spectral method of elements mass fraction measurement, a method of indirect measurements. The standard procedure of Brinell hardness test was applied ...
- Created on 30 October 2015
- 20. Determination of stiffness of structural elements drive ball mill
- (Geotechnical and mining mechanical engineering, machine building)
- Authors: V.V. Povetkin, Dr. Sci. (Tech.), Professor, K.I. Satpayev Kazakh National Technical University, Almaty, Kazakhstan O.A. Sushkova,Cand. Sci. (Tech.),K.I. Satpayev Kazakh NationalTechnical ...
- Created on 14 January 2015