标题：Influence of melt treatment parameters on the characteristics of modified cast iron in the metallurgical industry using intellectual analysis methods
期刊名称：Eastern-European Journal of Enterprise Technologies
印刷版ISSN：1729-3774
电子版ISSN：1729-4061
出版年度：2021
卷号：2
期号：12
页码：52-58
DOI：10.15587/1729-4061.2021.229642
语种：English
出版社：PC Technology Center
摘要：A study of the effect of holding the cast iron melt at temperatures of 1,300, 1,450 and 1,600?°C for 20, 55 and 90?minutes on the structure and properties of cast iron in a liquid state and after crystallization was carried out. The studies were carried out on samples with a diameter of 30?mm; cast iron containing 3.61–3.75?% carbon, 1.9–2.4?% silicon, 0.03?% manganese, 0.081–0.084?% phosphorus, 0.031–0.039?% sulfur was poured into green-sand molds. The samples were cast from the original cast iron (unmodified), modified with ferrosilicon 75 GOST 1415-93 (FS75), rare-earth metals (REM) and together with the REM+FS75 complex. The structure of cast iron was investigated by optical metallography, electron microscopy and X-ray structural analysis. An increase in the holding temperature and time of the cast iron melt leads to an increase in its hardness. An increase in temperature at a short holding time leads to an increase in strength in the entire investigated temperature range (1,300–1,600?°С). Holding for 90?minutes at a temperature of 1,450?°C corresponds to an extremum, after which, with a further increase in temperature, a sharp drop in strength is observed. The change in the toughness of cast iron is characterized in a similar way.
