Abstract
Increasing quality requirements, improving the mechanical and operational properties of products in metallurgy and mechanical engineering require the development of new effective ways to control the processes of structure formation in the manufacture of products, since it is structure of the material that determines its properties. The competitiveness of cast iron products in the market can be increased by improving the mechanical and performance characteristics. At present, a large number of technological methods have been developed to improve the properties of ironcarbon alloys, most of them are aimed at upgrading the structure of materials. The article discusses various methods of influence: microalloying, modification, refining and crystallization rate on the structuralphase composition and special properties of complex-alloyed white cast irons. In addition, the dependence of the special properties of cast irons on the structural-phase composition is described. The influence of chemical compositions on the structure and properties of white cast irons is presented. The joint influence of chromium, manganese, nickel, and titanium on the special properties of cast irons, such as heat resistance and wear resistance, is described. The percentage of alloying elements in the alloy is given to best achieve special properties. The factors influencing the heatwear resistance and abrasive wear resistance of complex-alloyed white cast irons are given. The relevance of the use of boron as a microalloying and modifying additive to improve the properties of complex-alloyed white cast irons has been confirmed, the concentration ranges of boron content and its effect on the structure and properties of these cast irons have been identified. Additional processing of base cast iron with boron significantly improves wear resistance and increases the hardness of the metal. Microalloying of cast iron with boron improves its technological and operational properties
Keywords:
microalloying, modification, refining, crystallization, structure, wear resistance, complex-alloyed white cast iron, white heat-resistant cast iron, scale resistance, growth resistance