Saint-Petersburg Mining University, Saint-Petersburg, Russia:

V. I. Bolobov, Senior Researcher, Professor, Doctor of Engineering Sciences, boloboff@mail.ru
S. A. Chupin, Assistant, Candidate of Engineering Sciences
V. S. Bochkov, Assistant, Candidate of Engineering Sciences
I. I. Mishin, Post-Graduate Student

The effect of high-temperature thermomechanical treatment (HTTT) on abrasive wear resistance of steel 30KHGGSA as the main material to manufacture holder of mining machine cutters is studied. The procedure of HTTT during deformation of cylindrical steel fragments at the preset settling-down rate and subsequent quenching is described. The finite element modeling in DEFORM-3 finds distribution of plastic strain in volume of forged pieces. On the plant based on the upright drilling machine, the abrasive wear resistance of forged pieces is tested on sandstone and siltstone as the medium-hardness and abrasivity co-rocks most frequently met in development heading. It is shown that pre-deformation of the fragments before quenching, i.e. HTTT, imporves the steel hardness from 44 to 55 HRC. It is shown that as against specimens nondeformed before quenching, the abrasive wear resistance of steel subjected to plastic straining up to ε_Σ ≈ 0.7 increases by 1.9 times in case of both siltstone and sandstone. Considering the obtained results, it is suggested to amend the manufacturing technology of cutters by quenching of fholder forging starting immediately from the forging temperature and by subjecting thereby the holder to high-temperature thermomechanical treatment. The cutting tool cartridge is to be held in the holder by cold pressing. It is assumed that HTTT application can essesntially (two times and more) improve wear resistance of steel holder head and, as a consequence, extend service life of cutters.

1. Belich E. V., Guselnikov L. M., Zadkov D. A., Podosenov A. A. Tests of new rock cutting tool in Vorkuа mines. Gornoe oborudovanie i elektromekhanika. 2007. No. 8. pp. 1–5.
2. Bernshtein M. L. Thermomechanical treatment of metals and alloys. In two volumes. Moscow : Metallurgiya, 1968. 1172 p.
3. Novikov I. I. Theory of thermal treatment of metals : Textbook. 3^rd enlarged and revised edition. Moscow : Metallurgiya, 1978. 392 p.
4. Smirnov M. A., Pyshmintsev I. Yu., Laev K. A., Akhmedyanov A. M. Effect of high-temperature thermomechanical treatment on the properties of a high-chromium steel. Vestnik Yuzhno-Uralskogo gosudarstvennogo universiteta. Ser.: Metallurgiya. 2012. No. 39(298). pp. 85–88.
5. Guriyanov D. A., Tesker E. I., Zamotaev B. N., Rubezhanskaya I. V. Influence of deformation parameters of rolling under the second HTTT on mechanical properties of steel. Izvestiya Volgogradskogo gosudarstvennogo tekhnicheskogo universiteta. Ser.: Problemy materialovedeniya, svarki i prochnosti v mashinostroenii. 2009. No. 11(59). pp. 134–137.
6. Zasypkin A. D., Dementyev V. B. Hardening of track’s pins of tracked machines with screw compression during the high-temperature thermomechanical processing. Traktory i selkhozmashiny. 2012. No. 4. pp. 37–39.
7. Shavrin O. I., Dementiev V. B. Experience in high-temperature thermomechanical treatment with helical reduction in the production of axisymmetric parts. Metal Science and Heat Treatment. 2002. Vol. 44, No. 7–8. pp. 346–347.
8. Zamotaev B. N., Eremni M. P., Chechin S. V., Kandaurov A. S. Influence of deformation parameters of rolling under the second HTTT with intermediate annealing on mechanical properties of steel. Izvestiya Volgogradskogo gosudarstvennogo tekhnicheskogo universiteta. Ser.: Problemy materialovedeniya, svarki i prochnosti v mashinostroenii. 2013. No. 15(118). pp. 96–99.
9. Smirnov M. A., Pyshmintsev I. Yu., Laev K. A., Khramkov E. V., Alyutin D. M. Properties of highchromium corrosion-resistant steels exposed to high-temperature thermomechanical treatment. Vestnik Magnitogorskogo gosudarstvennogo tekhnicheskogo universiteta im. G. I. Nosova. 2015. No. 3(51). pp. 78–82.
10. Barroqueiro B., Dias-De-Oliveira J., Pinho-Da-Cruz J., Andrade-Campos A. Multiscale analysis of heat treatments in steels: Theory and practice. Finite Elements in Analysis and Design. 2016. Vol. 114. pp. 39–56.
11. Krishna S. C., Tharian K. T., Chakravarthi K. V. A., Abhay Kumar Jha, Bhanu Pant. Heat Treatment and Thermo-Mechanical Treatment to Modify Carbide Banding in AISI 440C steel: A Case Study. Metallography, Microstructure, and Analysis. 2016. Vol. 5, Iss. 2. pp. 108–115.
12. Dobrzański L. A., Czaja M., Borek W., Labisz K., Tański T. Influence of hot-working conditions on a structure of X11MnSiAl17-1-3 steel for automotive industry. International Journal of Materials and Product Technology. 2015. Vol. 51, No. 3. pp. 264–280.
13. Bolobov V. I., Chupin S. A. By applying the method equal channel angular extrusion for products submicron structure at the bulk of metal. Nanoscale-Arranged Systems for Nanotechnology. Series: Nanotechnology Science and Technology. New York : Nova Science Publishers, 2015. pp. 112–115.
14. Karam-Abian M., Zarei-Hanzaki A., Abedi H. R., Heshmati-Manesh S. Micro and macromechanical behavior of a transformation-ind uced plasticity steel developed by thermomechanical processing followed by quenching and partitioning. Materials Science and Engineering. A: Structural Materials: Properties, Microstructure and Processing. 2016. Vol. 651. pp. 233–240.
15. Nabatnikov Yu. F., Goncharov A. B., Tulinov A. B., Ivanov V. A. Advanced processes for reconditioning of cone crusher. Gornyi Zhurnal. 2017. No. 6. pp. 68–72. DOI: 10.17580/gzh.2017.06.13
16. Fedorova L. V., Ivanova Yu. S., Voronina M. V. Improvement of threaded joint reliability by means of electromechanical processing. Journal of Mining Institute. 2017. Vol. 226. pp. 456–461.
17. Kirchlechner Ch., Djaziri S., Li Yujiao, Herbig M., Grabowski B. et al. Extremal strength caused by ultimate steel deformation. Chernye Metally. 2019. No. 1. pp. 65–67.
18. Krapivin M. G., Rakov I. Ya., Sysoev N. I. Mining tools. 3^rd enlarged and revised edition. Moscow : Nedra, 1990. 255 p.
19. Kolbasnikov N. G., Zotov O. G., Duranichev V. V., Naumov A. A., Mishin V. V., Ringinen D. A. Influence of severe plastic deformations at high temperatures on structure and properties of low carbon steels. Metalloobrabotka. 2009. No. 4(52). pp. 25–31.
20. Naumov A. A., Bezobrazov Y. A., Kolbasnikov N. G., Chernikov E. V. Novel Physical Simulation Technique Development for Multistage Metal Plastic Deformation Processing. Materials Science Forum. 2013. Vol. 762. pp. 62–69.
21. Bezobrazov Yu. A., Kolbasnikov N. G., Naumov A. A. Tension-compression method in the simulation of multistage plastic deformation. Steel in Translation. 2014. Vol. 44, No. 1. pp. 71–79.
22. Kolbasnikov N. G., Matveev M. A., Mishnev P. A. Effect of structure factor on high-temperature ductility of pipe steels. Metal Science and Heat Treatment. 2016. Vol. 58, No. 1. pp. 51–57.