连续驱动摩擦焊接45钢过程温度与材料流动的3D数值模拟

3D Numerical Simulation on Temperature Field and Material Flow During Continuous Driven Friction Welded 45 Steel

以45钢为对象,研究了连续驱动摩擦焊过程的温度场以及材料流动的位移场。数值模拟结果表明,在连续驱动焊过程的摩擦阶段,摩擦界面及其附近的材料温度值逐渐增加,材料向试件外流动的位移也随之增加;在停止阶段,试件的温度峰值降低,而材料流动的位移量在大轴向压力的作用下大幅度升高;在顶锻阶段,随着界面温度值的继续降低,使材料的流动位移缓慢增加并趋向稳定。

The temperature field and flow displacement field of 45# steel of continuous driven friction welding（CDFW） were investigated. The results of numerical simulation show that the material temperature in and near the friction surface increases with the increase of welding time at the friction stage of CDFW, which can result in the increase of material flow displacement towarding the component. At the stopping stage, the peak temperature of component decreases while the flow displacement of material towards the component largely increases under the large axial pressure. At the forging stage, the temperature of material goes on decreasing, which can make that the material flow displacement slowly increases and then close to constant.