Effects of titanium (Ti) contents on the wear resistance of low-alloy steel alloys Nozimjon Kholmirzaev, Nodir Turakhodjaev, Nosir Saidmakhamadov, Jamshidbek Khasanov, Abdujalol Bektemirov, et al. E3s Web of Conferences, 2024 In this study, the impact of titanium (Ti) on low-alloy steel alloys is examined, focusing on the mechanical properties of the alloy with varying Ti content levels. Heat treatment was conducted to enhance the mechanical properties and performance indicators of the casting samples. The elemental volume distribution mapping and microstructure analysis of the research samples were performed using SEM - Carl Zeiss Ultra Plus Field Emission. Subsequently, the hardness and wear resistance characteristics of samples containing Ti contents of 0, 0.1, 0.3, 0.5, 0.8, and 1.1 were evaluated post heat treatment. Notably, steel samples containing 0.3% and 0.5% Ti, exhibiting structures of ferrite, martensite, and limited bainite, demonstrated superior hardness and wear resistance properties. Abrasive wear resistance tests were conducted using a specialized device with a horizontal diamond disc. The primary objective of this research is to introduce the developed technology for the rolling mill rolls at a prominent metal manufacturing enterprise in the republic, resulting in enhanced economic efficiency through increased production volume. Consequently, achieving a hardness of HB 323 and improving wear resistance by 1.2 times were notable outcomes of the study.
Improving the technology of obtaining highquality castings from steel in sand-clay molds Nozimjon Kholmirzaev, Jamshidbek Khasanov, Baxodirjon Abdullayev, Shokhista Saidkhodjaeva, Abdujalol Bektemirov, et al. E3s Web of Conferences, 2024 This article examines the technology for producing high-quality steel and alloy castings in sand-clay molds. The optimization of the sandclay compound mold composition is explored, focusing on bentonite and kaolin clays as binders. The mold composition is refined based on the research conducted on these binding clays, resulting in the production of gas-free cast products. Additionally, the gas permeability of the sand-clay molds increased by 14-16%. The study also presents a test analysis of the gas permeability property, a crucial aspect of sand-clay mold quality. Furthermore, a mathematical model of the process was developed from the research findings to predict gas permeability values with varying amounts of binding clays, eliminating the need for further testing.
DEVELOPMENT OF TECHNOLOGY FOR OBTAINING THIN-WALLED DETAILS FROM GRAY CAST IRON IN SAND-CLAY MOULDS Jamshidbek Khasanov, Nozimjon Kholmirzaev, N. Saidmakhamadov, Begijon Tojiboev, Ergashev Dilshodbek, et al. International Journal of Mechatronics and Applied Mechanics, 2024 - In this article, the technology of casting thin-walled details into sand-clay molds has been developed based on the analysis of existing problems in casting detail manufacturing enterprises. In order to increase the liquid fluidity and hardness properties of G24 gray cast iron alloy, the technology of adding modifiers to the liquid alloy in the furnace and outside the furnace was developed. In addition, the composition of the sand-clay mold material and the technology of the processes of pouring the liquefied gray cast iron alloy into the mold were developed. Also, the technologies of using models made of modern ABS (acrylonitrile butadiene styrene) material have been improved in obtaining casting details of thin-walled parts in a sand-clay mold. Microstructural images of gray cast iron alloy samples cast on the basis of the used technologies were obtained and interpreted. As a result of the introduction of the developed technologies, it was possible to obtain high-quality thin-walled details. Based on the developed technologies and the modifiers included in the liquid alloy, the service life of cast thin casting has increased by 1.3 times.
Mathematical Modeling of the Effect of TiC Nanopowder Particles on the Wear Resistance Properties of Low-Alloy Steel Nozimjon Kholmirzaev, Nosir Saidmakhamadov, Jamshidbek Khasanov, Nuritdin Tadjiev, Bekzod Yusupov, et al. Materials Science Forum, 2024 In this article, the effect of TiC nanopowder particles on the wear resistance of low-alloy steel 35XGCL (analog is JIS G 5111) is mathematically modeled. First of all, the composition for liquefaction in an electric arc furnace was calculated. 5 and 10% TiC nanopowder particles were added to the alloy as a modifier before pouring liquid metal into the ladle. This process was performed before pouring the liquid metal from the furnace into the ladle. 15% of TiC was added in the furnace as a modifier. Lagrangian interpolation polynomial construction was used in this modeling. The amount of wear resistance was calculated by polynomial expression of the function with determination of unknown coefficients. The results obtained on the basis of the developed model were compared with case studies. The results of the analysis are shown by graphs.
Improvement of the Technology of Melting of Low Alloy Steel Alloy in an Electric Arc Furnace Nozimjon Kholmirzaev, Nodir Turakhodjaev, Nosir Saidmakhamadov, Nuritdin Tadjiev, Jamshidbek Khasanov, et al. Materials Science Forum, 2024 This article presents the optimal method of melting the 35XGCL (analog is JIS G 5111) low alloy steel alloy in DSP-2.0 2000 kg electric arc furnace. All the main stages of melting in an electric arc furnace are considered. In addition, analytical data on the study of the slag mode during the fluidization of the alloy are presented. The results of the evaluation of oxygen activity in metal depending on the chemical composition of slag oxidation and reduction cycles in the furnace are presented. Graphs of oxygen activity in the alloy depending on the total amount of iron, silicon, and manganese oxides in the slag are presented. Moreover, the effect of constant and additional deoxidizing aluminum content in the alloy on the impact strength of low alloy steel alloy is presented. The impact strength is improved when the constant aluminum content is in the range of 0.05-0.07%.
Obtaining high-quality foundry products from low-alloy steel alloys N Saidmakhamadov, N Turakhodjaev, S Tursunbaev, N Kholmirzaev, ... AIP Conference Proceedings 3390 (1), 080011 , 2026 2026.0
Analysis of technologies for improving steel purity by controlling slag content N Saidmakhamadov, N Kholmirzaev, V Bekchanova, F Odilov, B Karimov, ... AIP Conference Proceedings 3390 (1), 020014 , 2026 2026.0
QUM–GILLI QOLIP ARALASHMASINING GAZ OʻTKAZUVCHANLIK QOBILIYATIGA BOGʻLOVCHI GILLAR TA’SIRINI MATEMATIK MODELLASHTIRISH NB Xolmirzayev, GL Atajanov, JM Jurayev, SS Ummatqulov UZ CONFERENCES 1 (1) , 2025 2025.0
PO ‘LAT ISHLAB CHIQARISHDA NOMETALL QO ‘SHIMCHALARNING SHAKLLANISHI VA NAZORAT MEXANIZMLARI NB Xolmirzayev, ND Turaxodjayev, AB Erkinjonov Uz Conferences 1 (10) , 2025 2025.0
Mathematical modeling of the influence of the gating system on the quality of the cast product during alloy casting N Saidmakhamadov, N Kholmirzaev, V Bekchanova, F Odilov, ... AIP Conference Proceedings 3268 (1), 030002 , 2025 2025.0 Citations: 9
Mathematical Modeling of the Effect of TiC Nanopowder Particles on the Wear Resistance Properties of Low-Alloy Steel N Kholmirzaev, N Saidmakhamadov, J Khasanov, N Tadjiev, B Yusupov, ... Materials Science Forum 1139, 11-19 , 2024 2024.0 Citations: 10
Improvement of the Technology of Melting of Low Alloy Steel Alloy in an Electric Arc Furnace N Kholmirzaev, N Turakhodjaev, N Saidmakhamadov, N Tadjiev, ... Materials Science Forum 1139, 3-9 , 2024 2024.0 Citations: 9
Analysis of the Technology for Reducing the Amount of Gas Pores and Non-Metallic İnclusions in Liquid Steel Alloys N Kholmirzaev, N Saidmakhamadov, J Khasanov, S Saidkhodjaeva, ... I-CRAFT, 42 , 2024 2024.0
Development of technology for obtaining thin-walled details from gray cast iron in sand-clay moulds J Khasanov, N Kholmirzaev, N Saidmakhamadov, B Tojiboev, ... International Journal of Mechatronics and Applied Mechanics, 199-209 , 2024 2024.0 Citations: 9
Effects of titanium (Ti) contents on the wear resistance of low-alloy steel alloys N Kholmirzaev, N Turakhodjaev, N Saidmakhamadov, J Khasanov, ... E3S Web of Conferences 525, 03003 , 2024 2024.0 Citations: 11
Improving the technology of obtaining highquality castings from steel in sand-clay molds N Kholmirzaev, J Khasanov, B Abdullayev, S Saidkhodjaeva, ... E3S Web of Conferences 525, 03012 , 2024 2024.0 Citations: 1
Development of Technology of Making Shafts from Steel Alloy 35XGCL N Kholmirzaev, N Turakhodjaev, N Saidmakhamadov, J Khasanov, ... International Conference on Reliable Systems Engineering, 216-223 , 2023 2023.0 Citations: 12
Development of Technology of Making Shafts from Steel Alloy 35XGCL J Khasanov, S Saidkhodjaeva, N Sadikova International Conference on Reliable Systems Engineering (ICoRSE)-2023, 216 , 2023 2023.0
Technology of Processing the Liquid Steel Alloy Obtained in an Electric ARC Furnace Outside the Furnace N Kholmirzaev, N Sadikova, B Abdullayev, T Madiev, B Mutalov, ... Central Asian Journal of Theoretical and Applied Science 4 (4), 61-64 , 2023 2023.0 Citations: 1
Mathematical Modeling of the Effect of Titanium (TI) Added as a Modifier on the Wear Resistance of a Low–Alloyed Steel Alloy N Kholmirzaev, N Turakhodjaev, O Ermanov, A Ibragimov, A Sultonov, ... Central Asian Journal of Theoretical and Applied Science 4 (4), 55-60 , 2023 2023.0
Development of Technology of Mading Shafts from 35XGCL Brand Steel Alloy N Kholmirzaev, F Abdullaev, N Turakhodjaev, M Akramov, ... 2022.0
Development of quality steel alloy liquidation technology S Nosir, T Nodir, A Kamol, K Nozimjon, T Nuritdin American Journal of Interdisciplinary Research and Development 7 (2), 74 , 2022 2022.0 Citations: 14
Development of 280X29Nl alloy liquefaction technology to increase the hardness and corrosion resistance of cast products T Nodir, S Nosir, S Shokhista, O Furkat International Journal of Mechatronics and Applied Mechanics, 154-159 , 2021 2021.0 Citations: 29
Quality improvement of the steel melting technology in an electric arc furnace N Turakhodjaev, N Kholmirzaev, S Saidkhodjaeva, B Kasimov ACADEMICIA: An International Multidisciplinary Research Journal 11 (7), 48-54 , 2021 2021.0 Citations: 30
MATHEMATICAL MODELING OF THE EFFECT OF BINDING CLAYS ON GAS PERMEABILITY OF SAND-CLAY MOLD MIXTURES NB Kholmirzaev, AN Turaev, I Turdiev Sh, ME Akhmedova
MOST CITED SCHOLAR PUBLICATIONS
Quality improvement of the steel melting technology in an electric arc furnace N Turakhodjaev, N Kholmirzaev, S Saidkhodjaeva, B Kasimov ACADEMICIA: An International Multidisciplinary Research Journal 11 (7), 48-54 , 2021 2021.0 Citations: 30
Development of 280X29Nl alloy liquefaction technology to increase the hardness and corrosion resistance of cast products T Nodir, S Nosir, S Shokhista, O Furkat International Journal of Mechatronics and Applied Mechanics, 154-159 , 2021 2021.0 Citations: 29
Development of quality steel alloy liquidation technology S Nosir, T Nodir, A Kamol, K Nozimjon, T Nuritdin American Journal of Interdisciplinary Research and Development 7 (2), 74 , 2022 2022.0 Citations: 14
Development of Technology of Making Shafts from Steel Alloy 35XGCL N Kholmirzaev, N Turakhodjaev, N Saidmakhamadov, J Khasanov, ... International Conference on Reliable Systems Engineering, 216-223 , 2023 2023.0 Citations: 12
Effects of titanium (Ti) contents on the wear resistance of low-alloy steel alloys N Kholmirzaev, N Turakhodjaev, N Saidmakhamadov, J Khasanov, ... E3S Web of Conferences 525, 03003 , 2024 2024.0 Citations: 11
Mathematical Modeling of the Effect of TiC Nanopowder Particles on the Wear Resistance Properties of Low-Alloy Steel N Kholmirzaev, N Saidmakhamadov, J Khasanov, N Tadjiev, B Yusupov, ... Materials Science Forum 1139, 11-19 , 2024 2024.0 Citations: 10
Mathematical modeling of the influence of the gating system on the quality of the cast product during alloy casting N Saidmakhamadov, N Kholmirzaev, V Bekchanova, F Odilov, ... AIP Conference Proceedings 3268 (1), 030002 , 2025 2025.0 Citations: 9
Improvement of the Technology of Melting of Low Alloy Steel Alloy in an Electric Arc Furnace N Kholmirzaev, N Turakhodjaev, N Saidmakhamadov, N Tadjiev, ... Materials Science Forum 1139, 3-9 , 2024 2024.0 Citations: 9
Development of technology for obtaining thin-walled details from gray cast iron in sand-clay moulds J Khasanov, N Kholmirzaev, N Saidmakhamadov, B Tojiboev, ... International Journal of Mechatronics and Applied Mechanics, 199-209 , 2024 2024.0 Citations: 9
Increasing the Lifetime of Tillage Machine of Plowshares Made Stell Made by Foundry Technologies N Kholmirzaev, B Kasimov, B Abdullayev, A Sunnatillo, A Farrux JournalNX 7 (11), 55-59 , 0 Citations: 5
Improving the technology of obtaining highquality castings from steel in sand-clay molds N Kholmirzaev, J Khasanov, B Abdullayev, S Saidkhodjaeva, ... E3S Web of Conferences 525, 03012 , 2024 2024.0 Citations: 1
Technology of Processing the Liquid Steel Alloy Obtained in an Electric ARC Furnace Outside the Furnace N Kholmirzaev, N Sadikova, B Abdullayev, T Madiev, B Mutalov, ... Central Asian Journal of Theoretical and Applied Science 4 (4), 61-64 , 2023 2023.0 Citations: 1
Obtaining high-quality foundry products from low-alloy steel alloys N Saidmakhamadov, N Turakhodjaev, S Tursunbaev, N Kholmirzaev, ... AIP Conference Proceedings 3390 (1), 080011 , 2026 2026.0
Analysis of technologies for improving steel purity by controlling slag content N Saidmakhamadov, N Kholmirzaev, V Bekchanova, F Odilov, B Karimov, ... AIP Conference Proceedings 3390 (1), 020014 , 2026 2026.0
QUM–GILLI QOLIP ARALASHMASINING GAZ OʻTKAZUVCHANLIK QOBILIYATIGA BOGʻLOVCHI GILLAR TA’SIRINI MATEMATIK MODELLASHTIRISH NB Xolmirzayev, GL Atajanov, JM Jurayev, SS Ummatqulov UZ CONFERENCES 1 (1) , 2025 2025.0
PO ‘LAT ISHLAB CHIQARISHDA NOMETALL QO ‘SHIMCHALARNING SHAKLLANISHI VA NAZORAT MEXANIZMLARI NB Xolmirzayev, ND Turaxodjayev, AB Erkinjonov Uz Conferences 1 (10) , 2025 2025.0
Analysis of the Technology for Reducing the Amount of Gas Pores and Non-Metallic İnclusions in Liquid Steel Alloys N Kholmirzaev, N Saidmakhamadov, J Khasanov, S Saidkhodjaeva, ... I-CRAFT, 42 , 2024 2024.0
Development of Technology of Making Shafts from Steel Alloy 35XGCL J Khasanov, S Saidkhodjaeva, N Sadikova International Conference on Reliable Systems Engineering (ICoRSE)-2023, 216 , 2023 2023.0
Mathematical Modeling of the Effect of Titanium (TI) Added as a Modifier on the Wear Resistance of a Low–Alloyed Steel Alloy N Kholmirzaev, N Turakhodjaev, O Ermanov, A Ibragimov, A Sultonov, ... Central Asian Journal of Theoretical and Applied Science 4 (4), 55-60 , 2023 2023.0
Development of Technology of Mading Shafts from 35XGCL Brand Steel Alloy N Kholmirzaev, F Abdullaev, N Turakhodjaev, M Akramov, ... 2022.0
