【摘要】 金属的强度、韧性及焊接等性能取决于内部组织的晶粒大小及其排列情况。应用热力耦合有限元模型计算了其应力、应变和温度等参数在斜轧穿孔中的分布状态 ,进一步应用再结晶与有限元结合的数学模型对该过程内部晶粒进行了预测。通过室温条件下的理论与实测比较 ,认为该预测方法是可靠的、且具有一定的精度。应用这种方法可以对斜轧工艺参数进行调整 ,使其具有良好的内部质量。不仅可为后续工序提供高质量的管坯 ,而且可以减少不必要的工序。更多还原

【Abstract】 The properties of strength, toughness and weldability on metal depend on the size and arrangement of microstructure grains. The distributions of stress, strain and temperature in cross piercing process have been calculated by thermo mechanical models. The combination of a mathematical model for recrystallization and a FEM simulation for strain and temperature analyses were further performed in order to predict the grain size of hot metal in this process. Through comparison of theory with experiment in room temperature, the prediction method is considered reliable and has certain precision. Technological parameters can be adjusted to suitable microstructure by this way. It not only delivers better quality of seamless tube, but also reduces unnecessary technical process.更多还原