Improvement of lost-foam casting technology for producing cast products from gray cast iron
Keywords:
gray cast iron, expendable pattern, casting technology, thin-walled castings, thermal decomposition, casting defects, molding, cast product, CNC, EPSAbstract
This article investigates the technology of using expendable patterns for producing high-structural, thin-walled cast products from gray cast iron. In the research, the technology of using expendable patterns for producing high-quality cast products was improved. The properties of the material used for the expendable pattern, the dimensional accuracy of the pattern, and the surface condition were analyzed in terms of their influence on the quality of the cast product. In addition, the preparation of the pattern with a special coating and the decomposition characteristics of the pattern during interaction with molten gray cast iron were considered. During the study, the main factors affecting the occurrence of gas defects, filling of the mold cavity by the molten alloy, and the quality of the cast product were identified. Based on the obtained results, the possibilities of improving the quality of cast products made from gray cast iron using an optimal technology for the effective application of expendable patterns are demonstrated. The results of the study have practical significance for improving the technology of manufacturing complex-shaped, high-structural, thin-walled parts from gray cast iron alloy with a reduced amount of machining
References
Jiang W, Fan Z. Novel technologies for the lost foam casting process. Frontiers of Mechanical Engineering. 2018;13(1):37–47. DOI: 10.1007/s11465-018-0473-2.
Donahue R, Anderson K. Lost Foam Casting. In: ASM Handbook, Volume 15: Casting. ASM International; 2008. p. 640–645. DOI: 10.31399/asm.hb.v15.a0005254.
Kannan P, Biernacki JJ, Visco DP Jr. A review of physical and kinetic models of thermal degradation of expanded polystyrene foam and their application to the lost foam casting process. Journal of Analytical and Applied Pyrolysis. 2007;78(1):162–171. DOI: 10.1016/j.jaap.2006.06.005.
Mirbagheri SMH, Serajzadeh S, Varahram N, Davami P. Modelling of foam degradation in lost foam casting process. Materials & Design. 2006;27(2):115–124. DOI: 10.1016/j.matdes.2004.09.018.
Shayegh J, Hossainpour S, Rezaei M, Charchi A. Developing a new 2D model for heat transfer and foam degradation in EPS lost foam casting (LFC) process. International Communications in Heat and Mass Transfer. 2010;37(9):1396–1402. DOI: 10.1016/j.icheatmasstransfer.2010.07.015.
Chang AS, Shih TS. Permeability of coating in the lost foam casting process. International Journal of Cast Metals Research. 1999;12(4):263–275. DOI: 10.1080/13640461.2000.11819363.
Sun WL, Littleton HE, Bates CE. Formation mechanism of gas cavity defects in lost foam iron castings. International Journal of Cast Metals Research. 2003;16(6):549–553. DOI: 10.1179/136404603225006431.
Qiu K, Xiao B. Effect of Mechanical Vibration on Microstructure and Mechanical Properties of Gray Cast Iron in Lost Foam Casting. Mathematical Problems in Engineering. 2021;2021:4936147. DOI: 10.1155/2021/4936147.
Xiao BT, Fan ZT, Jiang WM, Xiang JH, Yan XF. Effect of vibration frequency on primary phase and properties of grey cast iron fabricated by lost foam casting. China Foundry. 2020;17(1):1–7. DOI: 10.1007/s41230-019-9083-9.
Khasanov, J., Turakhodjaev, N., Makhmudov, F., Turakhujaeva, S., Ermanov, O., & Ibragimov, A. (2023). Improvements in Obtaining Thin-Walled Casting Details Through Liquid Glass Mixtures. Central Asian Journal of Theoretical and Applied Science, 4(4), 51-54. https://doi.org/10.17605/OSF.IO/6T843
Kholmirzaev, N., Turakhodjaev, N., Saidmakhamadov, N., Khasanov, J., Saidkhodjaeva, S., & Sadikova, N. (2023). Development of Technology of Making Shafts from Steel Alloy 35XGCL. Lecture Notes in Networks and Systems, 762 LNNS. https://doi.org/10.1007/978-3-031-40628-7_18
Kholmirzaev, N., Turakhodjaev, N., Saidmakhamadov, N., Khasanov, J., Bektemirov, A., & Sadikova, N. (2024). Effects of titanium (Ti) contents on the wear resistance of low-alloy steel alloys. In E3S Web of Conferences (Vol. 525, p. 03003). EDP Sciences.
Khasanov J. et al. Development of technology for obtaining thin-walled details from gray cast iron in sand-clay moulds //International Journal of Mechatronics and Applied Mechanics. –2024. –No. 18. –С. 199-209
Downloads
Published
Issue
Section
License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
