Calculation of temperature and thermoelastic stresses in strikers during production of hollow steel billets in a unit of combined casting and deformation. Part 1

The article solves the problem of determining the temperature of calibrated strikers in a unit of combined casting and deformation during production of hollow steel billets. The authors substantiate the relevance of determining temperature fields and thermoelastic stresses in calibrated strikers when compressing the wall of a hollow billet and at full speed when cooling the strikers with water, and describe the strength and thermophysical properties of the steel from which the strikers are made. Geometry of the striker for producing a hollow billet in one pass is shown. The paper considers the initial data and temperature boundary conditions for calculating the temperature field of the striker during production of hollow billets in a unit of combined casting and deformation. The boundary conditions are given to determine the striker temperature as well as the values of heat flow and effective heat transfer coefficient. The results of calculating the temperature fields are performed in four sections and are presented for cha­racteristic lines and points located on the striker contact surface and in the contact layer at a depth of 5 mm from the working surface. Dimensions of the finite element grid were used in calculating the temperature field of the strikers. The temperature field of the strikers with collars was determined based on solution of the unsteady thermal conductivity equation with the corresponding initial and boundary conditions. The values and patterns of temperature distribution in a calibrated striker are presented when the wall of a hollow billet is compressed and when a hollow billet is produced in one pass in a unit of combined casting and deformation.