Structures, phase composition and properties formation of chromomanganse cast irons in the cast and normalization stay

Annotation. Purpose. Study the structure and properties of chromo-manganese cast iron in the cast and normalized state. Methodology. The study objects in this work were the experimental-industrial melting chromomanganese cast iron samples Microstructure researches were carried out by using the optical microscope “Neophot-21”. Microhardness of phases and structural components was defined by using PМТ-3 by standard procedure. Phase composition of samples was studied by the diffractometer DRON?3М in FeК? - radiation. Hardness of the investigated cast iron in the cast stay was determined by the Rockwell's standard method. Findings.. Complex research were carried out and showed that the hardness of the investigated chrom-manganese cast iron is determined by the content of carbon, manganese and the number of carbide component. The maximum hardness in the cast and the normalized state characterized by alloys 2, 3, which allows to predict the increase of abrasive and shock-abrasive wear resistance in as cast and normalized condition. Originality. For chromomanganese cast irons the interrelation between the quantitative ratio of primary austenite dendrites and eutectic component in the cast and normalized state and properties (micromechanical characteristics and hardness). Practical value. Understanding the mechanisms of structural changes and to obtain quantitative laws describing the formation of structural components, enables you to control the structure and properties of the products from chromomanganese cast iron