Quenching Stress of Hot-Rolled Seamless Steel Tubes under Different Cooling Intensities Based on Simulation

Large residual stress occurs during the quenching process of hot-rolled seamless steel tubes, which results in bending, cracking, and ellipticity exceeding standards seriously affects quality tubes. In addition, generation mechanism tubes is different from that plates due to characteristics annular section. this research, finite element simulation method was used study with cooling intensities. The variation law temperature on tube under intensities were analyzed. show radial close 0, circumferential axial stresses main factors affecting tube. With increase time, magnitude direction each component changed simultaneously. Finally, a typical distribution state “external compressive stress, internal tensile stress” presented thickness Furthermore, intensity, gradually increased mainly concentrated near wall