Залежність триботехнічних властивостей литого композиційного матеріалу системи [Al — FeCr], отриманого з використанням дисперсно-наповненої газмоделі, від параметрів його мікроструктури

• Дата: 2023
• Автори: Небожак, І.А., Новицький, В.Г., Дерев’янко, О.В., Каніболоцький, Д.С., Верховлюк, А.М.
• Формат: Стаття
• Мова: Українська
• Опубліковано: Physico-technological Institute of Metals and Alloys 2023
• Теми: Al-матриця; FeCr; σ-фаза; армування; дисперсний інокулятор; дисперсно-наповнена газмодель; інтерметалідна армуюча фаза; композитний виливок; композиційне зміцнення; ЛГМ-процес; ливарний Al-сплав марки АК12; ЛКМ системи [Al — FeCr]; металографічний аналіз; параметри мікроструктури; триботехнічні властивості
• Онлайн доступ: https://www.metalsandcasting.com/index.php/mcu/article/view/229
• Назва журналу: Metal and Casting of Ukraine

Analysis of scientific and technical published works and sources of patent information made it possible to formulate andset the goal of the performed scientific research work (R&D). By inoculating cast Al-alloy grade AK12 of DSTU 2839:1994with dispersed intermetallic FeCr in the “volume” of the casting mold (CM) during casting according to gasifying models,samples of zero-dimensional cast composite material (CCM) of the [Al — FeCr] system were obtained. The application of metallographicanalysis (MGA) showed that the zero-dimensional CCM of the [Al — FeCr] system has an optimal microstructure,and the parameters of its tribostructure (the specific number of inclusions of the σ-phase and its dispersion) not only changealong the height of the cast samples, but also depend on each other. The results of the wearability tests of the material underconditions of friction showed, that the tribotechnical properties (workability of the counter-body material and CCM of the [Al— FeCr] system and the coefficient of sliding friction of the pair “CCM of [Al — FeCr] system — steel 40X” is depending notonly on the height composite casting, as well as from the parameters of its tribostructure. The MGA showed, that after testingthe zero-dimensional CCM of the [Al — FeCr] system and the control casting during wear under conditions of friction, it wasexperimentally proven that the activation of the counter-body material and the coefficient of friction for steam sliding “Al-alloyAK12 — steel 40X” as a result of reinforcement (composite strengthening) of cast Al-alloy grade AK12 with dispersed intermetallicFeCr, on average, increases from 1.15 mg/(cm2·km) and 1.77 to 3.75 mg/(cm2·km) and 1.98, respectively. In contrast,its wear, on average, decreases from 17.85 mg/(cm2·km) to 14.15 mg/(cm2·km).