@misc{SimonAmirovYusubovetal., author = {Simon, Sylvio and Amirov, Fariz and Yusubov, Nizami and Amirli, Samir}, title = {Investigation of hardness on the surface formed during the cutting of HARDOX-500 steel based on the planning of the mathematical model of multi-factor experiments}, series = {Zenodo}, journal = {Zenodo}, editor = {Simon, Sylvio}, doi = {10.5281/zenodo.15095029}, pages = {13}, abstract = {The article investigates the variation of hardness on the cut surface of HARDOX-500 chromium-nickel steel, depending on the physical-mechanical properties of the processed metal, particularly its hardness. For this purpose, the hardness formed during the cutting of HARDOX-500 steel has been examined using the mathematical modeling of multi-factor experiments. As a result, a full-factorial mathematical regression equation has been derived based on the dependence on waterjet pressure (P), abrasive particle consumption (Q) and longitudinal feed of the nozzle (S_long). The conducted studies revealed that the hardness values on the surface of the cut area can vary significantly during hydro-abrasive cutting of the selected steel workpieces. Specifically, an increase in the longitudinal feed rate of the nozzle, the consumption of abrasive particles, and the pressure of the waterjet leads to an increase in the hardness of the cut surface. Among these factors, the longitudinal feed of the nozzle has the most significant impact on surface hardness. Furthermore, the product of waterjet pressure and longitudinal feed (X_2 X_3), as well as the combined effect of all three input parameters (X_1 X_2 X_3), are influential factors contributing to the increase in hardness. Thus, the study of hardness in hydroabrasive cutting using multi-factor planning is one of the pressing issues in mechanical engineering.}, language = {en} } @misc{SimonYusubovAmirli, author = {Simon, Sylvio and Yusubov, Nizami and Amirli, Samir}, title = {Investigation of surface roughness in hydroabrasive machining depending on changes in abrasive grain size and pressure}, series = {Reliability : Theory and Applications}, volume = {20}, journal = {Reliability : Theory and Applications}, number = {Special Issue 7 (83)}, editor = {Valiyev, Vilayat and Namazov, Subhan and Yusubov, Nizami and Simon, Sylvio}, publisher = {Gnedenko Forum}, address = {Medford MA; USA}, issn = {1932-2321}, doi = {10.24412/1932-2321-2025-783-239-245}, pages = {239 -- 245}, abstract = {The article investigates the surface roughness generated on HARDOX-500 chromium-nickel steel blanks in hydroabrasive machining as a function of changes in abrasive grain sizes. The study examines the intervals of roughness variation based on various technological, kinematic, structural,and processing environment factors, and identifies optimal roughness values. Experimental results indicate that as the granularity of abrasive grains increases, the surface roughness on the cut surface of the blanks also increases. However, as the pressure of the water-abrasive mixture and the consumption of abrasive grains rise, the height of the resulting surface roughness decreases.}, language = {en} } @misc{SimonYusubovAmirlietal., author = {Simon, Sylvio and Yusubov, Nizami and Amirli, Samir and Amirov, Fariz}, title = {Hardness of surface layers of blanks made of chromium-nickel alloys at hydroabrasive machining}, series = {Vestnik Mashinostroeniya}, volume = {104 / 2025}, journal = {Vestnik Mashinostroeniya}, number = {10}, issn = {0042-4633}, doi = {10.36652/0042-4633-2025-104-10-873-877}, pages = {873 -- 876}, abstract = {The hardness of surface layers of blanks made of HARDOX-500 steel is investigated after hydroabrasive machining on a FLOW-Gut machine with cooling in different modes. It is established that the surface hardness after hydroabrasive machining is higher than the hardness after grinding and polishing the surface after cutting}, language = {en} }