Hulin A. Development of thermal treatment rail bandage with increased wear resistance and the contact fatigue strength

Processes of structure formation in heat-treated steel, designed for the production of railway ties. Development of heat treatment of railway ties of vanadium micro-alloyed steel to increase their hardness, wear resistance and fatigue strength of the contact and maintaining the necessary level of viscous and plastic properties of the metal. In research methods were used and electron metallographic studies. Properties bandage steels were studied in laboratory and industrial conditions using standard methods for determining the mechanical properties (hardness, tensile strength, elongation, reduction of area, toughness) and special procedures for determining the durability and contact-fatigue strength. Developed further understanding of the laws of structure and quantitative characteristics of the structure of bands of steel, microalloyed with vanadium in the range of cooling rate 4,0-24,0 ° C / s. First established the influence of hardness and wear resistance of the structural state and the contact-fatigue strength of steel bands, microalloyed with vanadium. First set temperature and time parameters of the thermal treatment of steel bands, vanadium microalloyed. In a production environment developed and incorporated into the process instruction parameters of thermal hardening products, ensuring their high Complex properties. Conducted research and industrial testing. Metallurgy. Implemented.