Yazar "Ozel, Ahmet" seçeneğine göre listele

Listeleniyor 1 - 3 / 3
  • Küçük Resim Yok
    Öğe
    Analyses and Preventation of Scabbing Defect Formation on Cast Irons by Casting Simulation
    (Bayburt University, 2022) Baran, Fatih; Ozel, Ahmet; Erturk, Soner Özden; Camur, Elif Cansu
    In this study, the types and possible causes of the dart defect, which is one of the surface defects that are frequently encountered in foundries, has been examined. As a case, a gearbox part with a high scrap rate of dart defect is considered. First of all, the parameters (mechanical properties of the mold sand, casting temperature, etc.) that are effective in the formation of the dart defect have been checked. According to the outputs of the Magmasoft © Simulation software, in order to prevent the cause of the dart defect in the part made of EN-GJL 300 material, it was observed that the runner ingates did not work in balance as a result of faulty in runner design. The gating system was redesigned with the basic approaches of fluid mechanics, and with the simulation made before the application on pattern, a significant improvement was observed compared to the outputs of the first simulation study. It has been seen that the root cause of the dart defect, which is generally known as sand expansion and the solution of which is sought in the sand parameters, may also be caused by the runner system. By evaluating the general literature and process control results with the simulation software result outputs, the cause of the dart defect was determined and the scrap rate of the part has been reduced by eliminating this defect type.
  • Küçük Resim Yok
    Öğe
    Heat Treatment Studies For Improving The Solution Strengthened Ferritic Ductile Iron Cast Material EN GJS 500 – 14
    (Bayburt University, 2020) Erturk, Soner Özden; Ozel, Ahmet
    In this study the solution strengthened ferritic ductile iron cast material EN GJS 500 – 14 has been produced and characterized both by microstructural and mechanically. Also different heat treatments as water quench, air quench, in furnace cooling and austermpering in salt bath has been applied. The comparison of microstructures, hardness and tensile properties has been made in order to find best way to improve mechanical properties. By this way the new material EN GJS 500 – 14 will have more chance for replace ability to conventional grades of ductile iron. The results will also guide to other the solution strengthened ferritic ductile iron grades improvement.
  • Küçük Resim Yok
    Öğe
    Investigation on the Production of Solution Strengthened Ductile Iron Part Grade 500-14
    (Bayburt University, 2020) Erturk, Soner Özden; Ozel, Ahmet
    The aim of this study is investigating a new possibility instead of EN GJS 500-7 material. The new possibility is solution strenghted ductile iron EN GJS 500-14 with higher yield strength, higher elongation, low weight and low cost advantages. For the selected composition, whole mechanical and microstructural properties has been achieved. The thermal analyses and the computer simulation has been studied. Results showed good correlation between real casting results and computer simulation. Finally, EN GJS 500-14 casting material is replaceable for 500-7 in certain conditions; tensile, hardness, elongation and yield strength requirements. Keywords; solution strenghted ductile iron, casting simulation, thermal analyses