OBRABOTKAMETALLOV Vol. 26 No. 4 2024 122 EQUIPMENT. INSTRUMENTS Increasing the durability of drill bit teeth by changing its manufacturing technology Javokhir Toshov1, a, Doniyor Fozilov 2, b, Kassym Yelemessov 3, c, Ulugbek Ruziev 2, d, Dovudjon Abdullayev 2, e, Dinara Baskanbayeva 3, f, *, Lala Bekirova 4, g 1 Tashkent State Technical University, 2, University st., Tashkent, 100095, Republic of Uzbekistan 2 JSC “Scientifi c and Production Association” Almalyk MMC”, 1 V. Gaidarova st., Chirchik, 111700, Republic of Uzbekistan 3 K.I. Satbayev Kazakh National Research Technical University, 2 Satbaev st., Almaty, 050013, Republic of Kazakhstan 4 Azerbaijan State Oil and Industry University, 34 Azadliq Ave., Baku, AZ1010, Azerbaijan a https://orcid.org/0000-0003-4278-1557, j.toshov@tdtu.uz; b https://orcid.org/0009-0005-6362-8326, fozilovdoniyor81@gmail.com; c https://orcid.org/0000-0001-6168-2787, k.yelemessov@satbayev.university; d https://orcid.org/0009-0008-2371-3085, u.ruziev@agmk.uz; e https://orcid.org/0009-0005-6362-8326, dn.abdullaev@agmk.uz; f https://orcid.org/0000-0003-1688-0666, d.baskanbayeva@satbayev.university; g https://orcid.org/0000-0003-0584-7916, lala.bakirova@asoiu.edu.az Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2024 vol. 26 no. 4 pp. 112–124 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2024-26.4-112-124 ART I CLE I NFO Article history: Received: 22 August 2024 Revised: 10 September 2024 Accepted: 17 September 2024 Available online: 15 December 2024 Keywords: Drill bits Tungsten-cobalt alloys Manufacturing Pin bit Hard rocks Performance testing Funding This research was funded by Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan, grant number IRN BR18574141. ABSTRACT Introduction. The development of the mining industry requires increasing the durability and safe tool performance life. For bits of mining drilling machines, this problem is often solved by improving the material of the teeth of these bits. The paper presents the results of a study on the development of a technology for the manufacture of hard-alloy drill bits with increased wear resistance and testing of prototypes when drilling hard rocks. Changes in technology have led to changes in the shape of the tooth. Also, purer tungsten powder was used as the initial component. Research methods. The paper studies carbide teeth of bits manufactured at JSC Almalyk Mining and Metallurgical Combine using standard and modifi ed technology. Its structure and chemical composition were studied. Results and discussion. New methods for performing technological operations for the manufacture of carbide teeth (pins) and steel pin bits are developed and mastered. Tungstencobalt teeth were manufactured using VK10KS (90 %W; 10 % Co) hard alloy, produced using tungsten carbide powder synthesized by carbidization of purifi ed tungsten powder. The shape of the tooth surface was changed from ballistic to semi-ballistic. Metallic cobalt powder was used as a binder. Pin bits of the KNSh40×25 type are made of 0.35 C-Cr-Mn-Si steel. Tests of experimental bits were carried out at several mines, as a result of which its suitability for drilling rocks with a hardness of f` = 14–18 was established. The results of industrial operation showed that the durability of the teeth of bits manufactured by JSC Almalyk Mining and Metallurgical Combine is not signifi cantly inferior to bits from European manufacturers. At the same time, the cost of such bits is several times lower. For citation: Toshov J.B., Fozilov D.M., Yelemessov K.K., Ruziev U.N., Abdullayev D.N., Baskanbayeva D.D., Bekirova L.R. Increasing the durability of drill bit teeth by changing its manufacturing technology. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science, 2024, vol. 26, no. 4, pp. 112–124. DOI: 10.17212/1994-6309-2024-26.4-112-124. (In Russian). ______ * Corresponding author Baskanbayeva Dinara D., Ph.D. (Engineering), Deputy Director K.I. Satbayev Kazakh National Research Technical University, 2 Satbaev st., 050013, Almaty, Republic of Kazakhstan Tel.: +7 701 861 5162, e-mail: d.baskanbayeva@satbayev.university References 1. Zhukov I.A., Golikov N.S., Martyushev N.V. Design rationalization of the scraper conveyor section by means of an automated method of strength characteristics analysis. Ustoichivoe razvitie gornykh territorii = Sustainable Development of Mountain Territories, 2022, vol. 14 (1), pp. 142–150. DOI: 10.21177/1998-4502-2022-14-1142-150. (In Russian).
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