Study of wear of the building-up zone of martensite-austenitic and secondary hardening steels of the Cr-Mn-Ti system

• Дата: 2023
• Автори: Hlushkova, D.B., Bagrov, V.A., Saenko, V.A., Volchuk, V.M., Kalinin, A.V., Kalinina, N.E.
• Формат: Стаття
• Мова: English
• Опубліковано: Національний науковий центр «Харківський фізико-технічний інститут» НАН України 2023
• Назва видання: Problems of Atomic Science and Technology
• Теми: Physics of radiation and ion-plasma technologies
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/196088
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Study of wear of the building-up zone of martensite-austenitic and secondary hardening steels of the Cr-Mn-Ti system / D.B. Hlushkova, V.A. Bagrov, V.A. Saenko, V.M. Volchuk, A.V. Kalinin, N.E. Kalinina // Problems of Atomic Science and Technology. — 2023. — № 2. — С. 105-109. — Бібліогр.: 14 назв. — англ.

The work deals with wear of the building-up zone of martensite-austenitic and secondary hardening steels of the Cr-Mn-Ti system (partially alloyed with Mo, B, and V). Additional alloying of the studied steels with titanium in the amount of 2…5% supported avoiding cleavages along the building-up zone. It was determined that there is a 7…15 μm wide parent metal zone next to the weld line. The influence of temperature on the weld toughness of the building-up zone was assessed according to the criterion of Malkin and Tetelman. The microhardness of the surface layers of built-up layers and the range of its dispersion are close to the results of laboratory tests, where Тcₜ ∼ 823 K. This approves the formation of structure of metal of contact volumes with the collective effect of heating, plastic deformation and diffusion. It was experimentally approved that the change of microhardness in the sub-surface layers at the wear stage is justified simultaneously with the processes of mutual diffusion of friction pair materials, selective oxidation and thermodiffusion redistribution of the hardening phase under the influence of temperatures and deformations. The diffusion coefficient in the deformed sub-surface layer, which is up to some dozen micrometers thick, is one of the values providing the kinetics of growing of nuclear cracks and development of destruction cracks. The received results provide an opportunity to use martensite-austenitic and secondary hardening steels of the Cr-Mn-Ti system with built-up surface for the hot forming tools.