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Vol.24, No.2, 2024, pp. 187–192 |
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FRACTURE RESISTANCE OF THE DEPOSITED METAL UNDER DYNAMIC AND CYCLIC LOADING Leonid K. Leshchinskii1, Vitaliy P. Ivanov1, Elena V. Lavrova1, Dmitry Il’yaschenko2,3*, Elena V. Verkhoturova4 1) Pryazovskyi State Technical University, Mariupol, RUSSIAN FEDERATION L.K. Leshchinskii
2) National Research Tomsk Polytechnic University, Tomsk, RUSSIAN FEDERATION *email:
mita8@rambler.ru ,
3) Institute of Strength Physics and Materials Science SB RAS, Tomsk, RUSSIAN FEDERATION 4) Irkutsk National Research Technical University, Irkutsk, RUSSIAN FEDERATION
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Abstract Analyses of experimental data are presented that enable the fracture resistance assessment of dynamically and cyclically loaded materials used for the manufacture and surfacing of rollers in continuous casting machines for beam blanks and crimping mill rollers. It has been noted that steels for manufacturing and surfacing of crimping rolls with different carbon content and alloying elements, differ in the determination fraction of the crack nucleation work in the integral value of the impact strength. The value of that fraction is much higher for corrosion-resistant steels of the Cr13 type which are also distinguished by high fracture resistance to cyclic loading. It is shown that the properties of these steels make it possible, along with the use of CCM rollers for surfacing, to recommend them for hardening the rollers in crimping mills. The possibility of an additional increase in the efficiency of the crimping rolls by eliminating uneven wear along the length of the barrel by surfacing a layer of Cr13 steel with a variable carbon content (0.10-0.25 %) is considered. Keywords: fracture resistance, deposited metal, dynamic load, impact strength, fatigue crack |
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