Dependence of the lifelength of a hydraulic hammer pick on the wear resistance of its material

The article presents the experimental data on the blow energy impact on the rate of percussion–abrasion wear of a prototyping conical pick made of instrumental steel of three different grades in percussive interaction with granite block. A part of the tool was subjected to standard thermal treatment practiced at pick manufacturing plants, the other part was exposed to cold or cryogenic treatment. For validating extensibility of the test data to the in-situ conditions, the experimental parameters were set to be such that to be similar to the working conditions of the hydraulic hammer pick. In order to reach the similarity, the level of the contact stresses between the prototyping tool and rock in the tests was the same as in the real-life percussive penetration of the pick. The dependence between the rate of percussion–abrasion wear resistance and blow energy of the prototyping tool was determined, and the wearability rates were calculated for the pick of hydraulic hammer JCB HM380 in destruction of granite blocks. The pick lifelength was assumed as the number of blows made by the pick until total wear of its tip. From the comparison of the lifelength of picks made of the test steel grades and subjected to the mentioned thermal treatment, the conclusion is drawn that it is expedient to introduce the low-temperature and cryogenic treatment in the manufacturing technology of picks for hydraulic hammers.

Bolobov V. I., L. Thanh Binh, Chupin S. A., Plashchinsky V.A. Dependence of the lifelength of a hydraulic hammer pick on the wear resistance of its material. MIAB. Mining Inf. Anal. Bull. 2020;(5):68-79. [In Russ]. DOI: 10.25018/0236-1493-2020-5-0-68-79.

V.I. Bolobov¹, Dr. Sci. (Eng.), Professor, e-mail: boloboff@mail.ru,
Le Thanh Binh, Researcher, Vinacomin, Institute of Energy and Mining Engineering (IEMM), Hanoi, Socialist Republic of Vietnam,
S.A. Chupin¹, Cand. Sci. (Eng.), Assistant Professor,
V.A. Plashchinsky¹, Graduate Student,
¹ Saint-Petersburg Mining University, 199106, Saint-Petersburg, Russia.

V.I. Bolobov, e-mail: boloboff@mail.ru.

1. Fedoseev A. P. Stress–strain behavior of a hammer for crushing oversize rocks by dynamic loading. Gornyy informatsionno-analiticheskiy byulleten’. 2013, no 12, pp. 156—159. [In Russ].

2. Rodin M. S., Ivanov S. L. Justification and selection of tool parameters for fracturing oversize rocks in underground mines of De Beers. Journal of Mining Institute. 2009, vol. 182, pp. 105—109. [In Russ].

3. Tolstunov S. A., Polovinko A. V. Efficiency of percussive machines in strong rock mining.

Journal of Mining Institute. 2013, vol. 205, pp. 36—39. [In Russ].

4. Grechneva M. V., Tolkachev S. A., Vladimirtsev I. K. Improvement of wearability of mining machine parts. Vestnik Irkutskogo gosudarstvennogo tekhnicheskogo universiteta. 2011, no 12(59), pp. 26—29. [In Russ].

5. Pervov K. M., Korovin S. K., Arakcheev S. N., Safronov D. V. Methods and means for strengthening of rock-cutting tools of mining machines. Gornyy informatsionno-analiticheskiy byulleten’. 2003, no 10, pp. 168—172. [In Russ].

6. Ushakov L. S., Klimov V. E. Selecting key parameters for mathematical modeling of rock destruction by ram-type percussive tool. Gornyy informatsionno-analiticheskiy byulleten’. 2017, no 10, pp. 100–105. [In Russ]. DOI: 10.25018/0236-1493-2017-10-0-100-105.

7. Yang Daolong, Li J., Du C., Liu S., Zheng Kehong, Jiang H. Wear performance of conical pick in rotary-drilling cutting process. Electronic Journal of Geotechnical Engineering. 2015. Vol. 20, No 8. Pp. 2031—2040.

8. Li Xuefeng, Wang Shibo, Ge S., Malekian Reza, Li Z. A theoretical model for estimating the peak cutting force of conical picks. Experimental Mechanics. 2018. Vol. 58, Pp. 709–720. DOI: 10.1007/s11340-017-0372-1.

9. Zverev E.A., Skeeba V. Yu., Martyushev N. V., Skeeba P.Yu. Integrated quality ensuring technique of plasma wear resistant coatings. Key Engineering Materials. 2017. Vol. 736. Pp. 132—137.

10. Prokopenko S. A., Ludzish V. S., Kurzina I. A. Improvement of cutting tools to increase the efficiency of destruction of rocks tunnel harvesters. Journal of Mining Science, 2016, Vol. 52, no 1, pp. 153—159.

11. Prokopenko S. A., Ludzish V. S., Kurzina I. A. Design of new-class picks for cutter—loaders. Gornyi Zhurnal, 2017, no 2, pp. 75—78. [In Russ].

12. Krasnyy V.A. The use of nanomaterials to improve the wear resistance of machine parts under fretting corrosion conditions. IOP Conference Series: Materials Science and Engineering. 2019. Vol. 560(1), Article 012186. DOI: 10.1088/1757-899X/560/1/012186.

13. Olt J., Maksarov V. V., Krasnyy V.A. Study of bearing units wear resistance of engines career dump trucks, working in fretting corrosion conditions. Journal of Mining Institute. 2019. Vol. 235, pp. 70—77. DOI: 10.31897/PMI.2019.1.70.

14. Gabov V. V., Zadkov D. A., Nguyen Khac Linh Features of elementary burst formation during cutting coals and isotropic materials with reference cutting tool of mining machines. Journal of Mining Institute. 2019. Vol. 236, pp. 153—161. DOI: 10.31897/PMI.2019.2.153.

15. Bolobov V. I., Le Thanh Binh Regular patterns of material failure in hammer under repetitive unit blows. Journal of Mining Institute. 2018, vol. 233, pp. 525—533. [In Russ]. DOI: 10.31897/PMI.2018.5.525.

16. Ushakov L. S., Kotylev Yu. E., Kravchenko V. A. Gidravlicheskie mashiny udarnogo deystviya [Hydraulic percussive machines], Moscow, Mashinostroenie, 2000, 416 p.

17. Klimenko A. P. Kholod v mashinostroenii [Cold in machine building], Moscow, Mashinostroenie, 1969, 248 p.

18. Candane D., Alagumurthi N., Palaniradja K. Effect of cryogenic treatment on microstructure and wear characteristics of AISI M35 HSS. International Journal of Materials Science and Applications. 2013. Vol. 2. Issue 2, pp. 56—60.

19. Gill S. S., Singh J., Singh R., Singh H. Metallurgical principles of cryogenically treated tool steels — a review on the current state of science. International Journal of Advanced Manufacturing Technology. 2011. Vol. 54, pp. 59—82.

20. Patil P. I., Tated R. G. Comparison of effects of cryogenic treatment on different types of steels: a review. International Conference in Computational Intelligence (ICCIA) — Proceedings published in International Journal of Computer Applications® (IJCA). 2012. pp. 10—29.

21. Tated R. G., Kajale S. R., Iyer K. Improvement in tool life of cutting tool by application of deep cryogenic treatment. 7th International Tooling Conference Held, Politecnico di Torino, Italy. 2006. Pp. 135—141.

22. Collins D. N., Dormer J. Deep cryogenic treatment of a D2 cold-work tool steel. Heat Treatment of Metals. 1997, no 3, Pp. 71—74.

23. Kalsi N. S. Cryogenic treatment of tool materials: a review. Materials and Manufacturing Processes. 2012. Vol. 25. Pp. 1077—1100.

24. Ivancivsky V. V., Skeeba V.Y., Bataev I. A., Lobanov D. V., Martyushev N. V., Sakha O. V., Khlebova I. V. The features of steel surface hardening with high energy heating by high frequency currents and shower cooling. IOP Conference Series: Materials Science and Engineering. 2016. Vol. 156(1). 012025.

25. Plotnikova N. V., Skeeba V.Y., Martyushev N. V., Miller R. A., Rubtsova N. S. Formation of high-carbon abrasion-resistant surface layers when high-energy heating by high-frequency currents. IOP Conference Series: Materials Science and Engineering. 2016. Vol. 156(1). 012022.

26. Martyushev N. V. Alignment of the microstructure of castings from the heterophase lead bronzes. Advanced Materials Research. 2014. Vol. 880. Pp. 163—167.

27. Ivanov K. I., Varich M. S., Dusev V. I., Andreev V. D. Tekhnika bureniya pri razrabotke mestorozhdeniy poleznykh iskopaemykh. Izd. 2 [Drilling equipment in mineral mining, 2nd edition], Moscow, Nedra, 1974, 408 p.

28. Bolobov V. I., Le Thanh Binh, Plashchinskiy V.A. Propagation of fracture in rocks under impact. Obogashchenie rud. 2019, no 6, pp. 3—7. [In Russ].

29. Le Thanh Binh, Bolobov V. I., Nguyen Khac Linh Effect of cold treatment on mechanical properties and wear resistance of materials of hydraulic hammer picks. Gornyy informatsionnoanaliticheskiy byulleten’. 2017. Special edition 25, 12 p. [In Russ].