Дослідження структури ресурсозберігаючого легуючого сплаву з вмістом Fe, Ni, Cr, W, Mo, Nb, Ti, отриманого з техногенних відходів, для підвищення безпеки життєдіяльності

• Datum: 2023
• Hauptverfasser: Смірнов, Олексій, Петрищев, Артем
• Format: Artikel
• Sprache: Ukrainisch
• Veröffentlicht: Physico-technological Institute of Metals and Alloys 2023
• Schlagworte: оксидні техногенні відходи; окалина легованих сталей; відновна плавка; мікроскопічні дослідження
• Online Zugang: https://www.metalsandcasting.com/index.php/mcu/article/view/55
• Назва журналу: Metal and Casting of Ukraine

The article is devoted to the research of physical and chemical features of recovery of waste from production of high-alloy steels and alloys with the production of an alloying alloy by means of reduction melting. To achieve this goal, a set of stateof-the-art research methods was applied using scanning electron microscopy together with x-ray microanalysis to determine the chemical composition of the target surface areas of samples. Due to the successful stages of research, significant results were obtained, namely, that at the ratio of oxygen to carbon in the charge of 1.10, the assumed phase composition of the resource-saving alloy consists of a solid solution of alloying elements in the iron crystal lattice, as well as iron carbide compounds and alloying elements. Photos of the microstructure clearly showed several phases with different ratios of alloying elements. The content of chromium reached 53.04 % by weight, nickel – 55.02 % by weight. The content of molybdenum, tungsten, niobium, and titanium in the area of the studied surface was at the level of 7.8 % by weight, 27.83 % by weight, 20.61 % by weight, and 16.09 % by weight, respectively. Carbon in the studied surface points was equal to 0.65 % by weight to 2.08 % by weight. Some of the studied particles with an increased content of tungsten, molybdenum, and niobium apparently corresponded to a complex carbide compound. The content of residual carbon in the studied sections of the samples had relatively low values, while sufficient to provide the necessary reducing capacity during the use of the alloy. This allowed us to draw a number of important practical conclusions that the alloy indicators provide the possibility of replacing some of the standard ferroalloys in the smelting of steels that have some restrictions on the carbon content. In this case, it is advisable to determine the most favorable content of carbon reducing agent in the charge to achieve the required reduction of alloying elements together with a relatively low residual carbon in the target alloy. Simultaneously with the processing and return to production of technogenic metallurgical waste, the environmental stress of industrially developed regions, environmental pollution is reduced and life safety is increased.