Методи виробництва виливків для грунтообробної техніки, різальних та ударних інструментів, що самозаточуються

• Date: 2023
• Main Authors: Калюжний, П. Б., Дорошенко, В. C., Шалевська, І. А.
• Format: Article
• Language: Ukrainian
• Published: National Academy of Sciences of Ukraine, Physical-Technological Institute of Metals and Alloys of NAS of Ukraine 2023
• Subjects: лиття металу; залізовуглецеві сплави; термічна обробка; високоміцний ізотермічно загартований чавун; властивості; ізотермічна витримка; загартування; лиття за газифікованими моделями
• Online Access: https://plit-periodical.org.ua/index.php/plit/article/view/methods-manufacture-castings-soil-treatment-equipment-cutting-an
• Journal Title: Casting Processes

Physico-Techological institure of Metals and Alloys of NAS of Ukraine (Kyiv, Ukraine) УДК 669.13: 621.74.045 The development of methods for controlling the structure of cast materials and the creation of adjustable-differentiated mechanical properties of iron-carbon alloys for tillage tools and cutting tools reveals both the resource-efficient potential of these alloys and allows you to create efficient production methods. This applies to the possibility of mutual complementarity between the processes of metal casting and heat treatment (НТ) of the hardened casting from its hot cast state, which significantly reduces the production process of the heat-treated casting. In this development, the Lost Foam Casting Process was used. Following the example of bionics about the properties of the teeth of rodents (beavers, rats), as the different hardness of the tooth surface, which determines its self-sharpening, created conditions for self-sharpening of metal products. These products operate in extreme conditions and their production methods have been tested on the example of high-strength cast iron (ductile iron, DI). As a result of our work we have developed a method of manufacturing castings from DI with the creation of differentiated hardness values on different surfaces of the casting, which allows self-sharpening of the tooth, ploughshare, cutter or bit as it wears. This will increase the productivity of such products that operate in extreme conditions, save resources that lead to the movement of these products, and the cost of sharpening or replacing them. For these methods, in addition to aqueous quenching medium, a resource-efficient method of quenching the casting by blowing container form and fluidizing the molding sand without the use of alkaline, liquid metal, acidic or synthetic quenching liquids with negative impact on the environmentand difficult environmental costs cleaning, circulation and disposal of waste. Acquisition of such a characteristic as self-sharpening under the influence of external factors brings the described materials closer to smart materials.   References 1. John R. Keough, PE. Tim Dorn, Kathy L. Hayrynen et al. Agricultural Applications of Austempered Iron Components. URL: https://www.researchgate.net/publication/2423593292. International application WO2008076497A1. IPC: C22C 37/10, C21C 1/10. As-cast carbidic ductile iron / J. P. Lemke, R. E. Eppich. Publication 26.06.2008.3. Saghafian L. H. et al. Comparison of Wear Behavior of a Ductile Iron in Austempered and Quenched-Tempered Conditions. URL: https://www.researchgate.net/publication/3561478324. Patent of Ukraine no. 19545 А. IPC: C21D 1/18, C21D 5/00. Method of isothermal hardening of parts made of ferrocarbon alloys / I. G. Neyizhko, publ. 25.12.1997, Bull. No. № 6 [in Ukrainian].5. Makarenko K. V. (2014). Rational structuring of graphitized cast iron / Trudy NGTU im. R.E. Alekseeva. No. 2. pp. 196–205 [in Russian].6. Najdek V. L., Gavrilyuk V. P., Neizhko I. G. (2008). Bainite high-strength cast iron. Kiev: FTIMS NAN of Ukraine. 139 p. [in Russian].7. Nahtigal V. (2007). Bionics. M.: Mir knigi. 128 p. [in Russian].8. Patent of Ukraine no. 106005. IPC: В22D 27/04. Method of cooling castings in foundry form or container with bulk filler / V. S. Doroshenko, P. B. Kalyuzhnij, publ. 11.04.2016, Bull. No. № 7 [in Ukrainian].9. Kaliuzhnyi P. (2020). Influence of Sand Fluidization on Structure and Properties of Aluminum Lost Foam Casting. Archives of Foundry Engineering. Vol. 20. No. 1. P. 122–126.10. Patent of Ukraine no. 123731. IPC: B22 D7/00, B22 D23/00, С21D5/02, С21D1/20, B22 D27/04. A method of manufacturing castings from bainite or ausferite cast iron with spherical graphite / V. S. Doroshenko, V. O. Shinskij, publ. 12.03.2018, Bull. No. 5 [in Ukrainian].