Formation of Structure and Properties of Low-Carbon Pipe Steel with Ultralow Manganese Content during Thermomechanical Treatment

The influence of finish rolling and accelerated cooling stages on structure and property formation for low-manganese steel under laboratory conditions is studied. Rolling ends at temperatures in both the γ-region and at various temperatures in the γ + α -region. Accelerated cooling completion temperature is varied in the range of 630–350°C. Comprehensive analysis of the microstructure, crystallographic texture, and fine structure parameters of laboratory rolled specimen is performed. Specific features of structure and property formation are studied and compared with known pipe steels. The range of rolling parameters providing an optimum combination of strength, toughness, and cold resistance is determined.