N. B.Pugacheva, A. V.Nokhrina, E. I.Senaeva, R. A.Savrai

MECHANICAL PROPERTIES OF AN Fe–Ti–Ni–B–C SHS COMPOSITE

The paper studies the structure, mechanical properties and wear resistance of a composite produced by self-propagating high-temperature synthesis (SHS) with an average chemical composition, wt%: 35.47 ± 1.5 Fe; 24.08 ± 1.4 Ti; 13.99 ± 0.5 Ni; 17.91 ± 0.4 B; 8.54 ± 0.5 C. Testing has revealed that the composite has wear resistance on a level with one of the Hardox 500 wear-resistant steels. The composite is characterized by a wide range of values of transverse bending strength R_bm30 from 200 to 800 MPa. Steel 40X shows a bending strength R_bm30 of 1590 MPa, and the values of this characteristic for the Hardox 500 steel range between 2970 and 3020 MPa. The composite has low impact strength values KCU = 0.02 MJ/m2, compared with KCU = 0.35 MJ/m2 for steel 40X and KCU = 1.59 MJ/m2 for Hardox 500. The Fe–Ni–Ti–C–B SHS composite should not be used for bending parts and those experiencing shock loads; however, it suits perfectly for protecting the surfaces of parts subject to intense abrasive wear.

Acknowledgment: The work was performed within the framework of the state assignment of the IMASH Ural Branch of the Russian Academy of Sciences on the topic No. 124020700063-3.

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